gpu: rename Surface.Descriptor.xlib_window -> xlib

To appropriately match the upstream, webgpu.h, which has renamed in this way.

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

gpu/examples/sample_utils.zig

@@ -175,7 +175,7 @@ pub fn createSurfaceForWindow(
             .hwnd = glfw_native.getWin32Window(window),
         },
     } else if (glfw_options.x11) gpu.Surface.Descriptor{
-        .xlib_window = .{
+        .xlib = .{
             .label = "basic surface",
             .display = glfw_native.getX11Display(),
             .window = glfw_native.getX11Window(window),

gpu/src/NativeInstance.zig

@@ -141,7 +141,7 @@ pub fn createSurface(native: *const NativeInstance, descriptor: *const Surface.D
                 .label = if (src.label) |l| @ptrCast([*c]const u8, l) else null,
             });
         },
-        .xlib_window => |src| blk: {
+        .xlib => |src| blk: {
             var desc: c.WGPUSurfaceDescriptorFromXlibWindow = undefined;
             desc.chain.next = null;
             desc.chain.sType = c.WGPUSType_SurfaceDescriptorFromXlibWindow;

gpu/src/Surface.zig

@@ -25,7 +25,7 @@ pub const DescriptorTag = enum {
     windows_hwnd,
     windows_core_window,
     windows_swap_chain_panel,
-    xlib_window,
+    xlib,
     canvas_html_selector,
 };
 
@@ -48,7 +48,7 @@ pub const Descriptor = union(DescriptorTag) {
         label: ?[]const u8,
         swap_chain_panel: *anyopaque,
     },
-    xlib_window: struct {
+    xlib: struct {
         label: ?[]const u8,
         display: *anyopaque,
         window: u32,