Update to latest Zig master (0.10.0-dev.2017+a0a2ce92c) (#261)

* use `@ceil` instead of `std.math.ceil`
* `ChildProcess.init` does not allocate anymore
* update CI zig version
* examples: temporarily switch to fork of zigimg compatible with zig-master

Commands executed:

```
git submodule set-url -- examples/libs/zigimg https://github.com/slimsag/zigimg
git submodule set-branch --branch zig-master -- examples/libs/zigimg
git submodule update --init --remote examples/libs/zigimg
```

Signed-off-by: Stephen Gutekanst <stephen@hexops.com>
Co-authored-by: Stephen Gutekanst <stephen@hexops.com>

gpu-dawn/.github/workflows/ci.yml

@@ -16,7 +16,7 @@ jobs:
       - name: Setup Zig
         run: |
           sudo apt install xz-utils
-          sudo sh -c 'wget -c https://ziglang.org/builds/zig-linux-x86_64-0.10.0-dev.1600+af844931b.tar.xz -O - | tar -xJ --strip-components=1 -C /usr/local/bin'
+          sudo sh -c 'wget -c https://ziglang.org/builds/zig-linux-x86_64-0.10.0-dev.2017+a0a2ce92c.tar.xz -O - | tar -xJ --strip-components=1 -C /usr/local/bin'
       - name: Clone mach-glfw
         run: rm libs/mach-glfw && git clone https://github.com/hexops/mach-glfw libs/mach-glfw
       - name: install (debug)
@@ -37,7 +37,7 @@ jobs:
       - name: Setup Zig
         run: |
           sudo apt install xz-utils
-          sudo sh -c 'wget -c https://ziglang.org/builds/zig-linux-x86_64-0.10.0-dev.1600+af844931b.tar.xz -O - | tar -xJ --strip-components=1 -C /usr/local/bin'
+          sudo sh -c 'wget -c https://ziglang.org/builds/zig-linux-x86_64-0.10.0-dev.2017+a0a2ce92c.tar.xz -O - | tar -xJ --strip-components=1 -C /usr/local/bin'
       - name: Clone mach-glfw
         run: rm libs/mach-glfw && git clone https://github.com/hexops/mach-glfw libs/mach-glfw
       - name: install (release-fast)
@@ -58,7 +58,7 @@ jobs:
       - name: Setup Zig
         run: |
           sudo apt install xz-utils
-          sudo sh -c 'wget -c https://ziglang.org/builds/zig-linux-x86_64-0.10.0-dev.1600+af844931b.tar.xz -O - | tar -xJ --strip-components=1 -C /usr/local/bin'
+          sudo sh -c 'wget -c https://ziglang.org/builds/zig-linux-x86_64-0.10.0-dev.2017+a0a2ce92c.tar.xz -O - | tar -xJ --strip-components=1 -C /usr/local/bin'
       - name: Clone mach-glfw
         run: rm libs/mach-glfw && git clone https://github.com/hexops/mach-glfw libs/mach-glfw
       - name: install (debug)
@@ -79,7 +79,7 @@ jobs:
       - name: Setup Zig
         run: |
           sudo apt install xz-utils
-          sudo sh -c 'wget -c https://ziglang.org/builds/zig-linux-x86_64-0.10.0-dev.1600+af844931b.tar.xz -O - | tar -xJ --strip-components=1 -C /usr/local/bin'
+          sudo sh -c 'wget -c https://ziglang.org/builds/zig-linux-x86_64-0.10.0-dev.2017+a0a2ce92c.tar.xz -O - | tar -xJ --strip-components=1 -C /usr/local/bin'
       - name: Clone mach-glfw
         run: rm libs/mach-glfw && git clone https://github.com/hexops/mach-glfw libs/mach-glfw
       - name: install (release-fast)
@@ -102,10 +102,10 @@ jobs:
       - name: Setup Zig
         run: |
           $ProgressPreference = 'SilentlyContinue'
-          Invoke-WebRequest -Uri "https://ziglang.org/builds/zig-windows-x86_64-0.10.0-dev.1600+af844931b.zip" -OutFile "C:\zig.zip"
+          Invoke-WebRequest -Uri "https://ziglang.org/builds/zig-windows-x86_64-0.10.0-dev.2017+a0a2ce92c.zip" -OutFile "C:\zig.zip"
           cd C:\
           7z x zig.zip
-          Add-Content $env:GITHUB_PATH "C:\zig-windows-x86_64-0.10.0-dev.1600+af844931b\"
+          Add-Content $env:GITHUB_PATH "C:\zig-windows-x86_64-0.10.0-dev.2017+a0a2ce92c\"
       - name: Clone mach-glfw
         run: rm libs/mach-glfw && git clone https://github.com/hexops/mach-glfw libs/mach-glfw
       - name: install (debug)
@@ -130,10 +130,10 @@ jobs:
       - name: Setup Zig
         run: |
           $ProgressPreference = 'SilentlyContinue'
-          Invoke-WebRequest -Uri "https://ziglang.org/builds/zig-windows-x86_64-0.10.0-dev.1600+af844931b.zip" -OutFile "C:\zig.zip"
+          Invoke-WebRequest -Uri "https://ziglang.org/builds/zig-windows-x86_64-0.10.0-dev.2017+a0a2ce92c.zip" -OutFile "C:\zig.zip"
           cd C:\
           7z x zig.zip
-          Add-Content $env:GITHUB_PATH "C:\zig-windows-x86_64-0.10.0-dev.1600+af844931b\"
+          Add-Content $env:GITHUB_PATH "C:\zig-windows-x86_64-0.10.0-dev.2017+a0a2ce92c\"
       - name: Clone mach-glfw
         run: rm libs/mach-glfw && git clone https://github.com/hexops/mach-glfw libs/mach-glfw
       - name: install (release-fast)
@@ -157,7 +157,7 @@ jobs:
         run: |
           brew uninstall --ignore-dependencies libx11 # https://github.com/ziglang/zig/issues/11066
           brew install xz
-          sudo sh -c 'wget -c https://ziglang.org/builds/zig-macos-x86_64-0.10.0-dev.1600+af844931b.tar.xz -O - | tar -xJ --strip-components=1 -C /usr/local/bin'
+          sudo sh -c 'wget -c https://ziglang.org/builds/zig-macos-x86_64-0.10.0-dev.2017+a0a2ce92c.tar.xz -O - | tar -xJ --strip-components=1 -C /usr/local/bin'
       - name: Clone mach-glfw
         run: rm libs/mach-glfw && git clone https://github.com/hexops/mach-glfw libs/mach-glfw
       - name: install (debug)
@@ -181,7 +181,7 @@ jobs:
         run: |
           brew uninstall --ignore-dependencies libx11 # https://github.com/ziglang/zig/issues/11066
           brew install xz
-          sudo sh -c 'wget -c https://ziglang.org/builds/zig-macos-x86_64-0.10.0-dev.1600+af844931b.tar.xz -O - | tar -xJ --strip-components=1 -C /usr/local/bin'
+          sudo sh -c 'wget -c https://ziglang.org/builds/zig-macos-x86_64-0.10.0-dev.2017+a0a2ce92c.tar.xz -O - | tar -xJ --strip-components=1 -C /usr/local/bin'
       - name: Clone mach-glfw
         run: rm libs/mach-glfw && git clone https://github.com/hexops/mach-glfw libs/mach-glfw
       - name: install (release-fast)