* add wayland-headers include path
* add wayland protocols header to wayland target includes
* move `xkb_unicode.c` to `sources_linux.c`
* glfw: document where wayland generated sources come from
* glfw: update sdk-linux-x86_64 to include Wayland protocol sources
See https://github.com/hexops/sdk-linux-x86_64/pull/2
Co-authored-by: Stephen Gutekanst <stephen@hexops.com>
This consistently shaves off about 40ms (~130ms -> ~90ms, 30% reduction) from build times when iterating.
On Windows, I suspect the result will be much greater due to slow filesystem perf there and the fact
that this reduces the # of files read.
This was originally brought to my attention as a possibility by @meshula in hexops/dawn#2, the way this
works is by reducing compilation units so that C headers only need to be read/parsed/interpreted once
rather than once per individual C source file we are compiling.
Signed-off-by: Stephen Gutekanst <stephen@hexops.com>
