wgpu: Report support for 'half' #292

Job	Run time
build (windows, x86_64, msvc, Debug)	56s
build (windows, x86_64, msvc, Release)	1m 3s
build (windows, aarch64, msvc, Debug)	1m 49s
build (windows, aarch64, msvc, Release)	2m 22s
build (linux, x86_64, gcc, Debug)	33s
build (linux, x86_64, gcc, Release)	34s
build (linux, x86_64, clang, Debug)	51s
build (linux, x86_64, clang, Release)	53s
build (linux, aarch64, gcc, Debug)	1m 21s
build (linux, aarch64, gcc, Release)	1m 14s
build (linux, aarch64, clang, Debug)	1m 44s
build (linux, aarch64, clang, Release)	1m 28s
build (macos, aarch64, clang, Debug)	1m 18s
build (macos, aarch64, clang, Release)	1m 7s
	17m 13s

Provide feedback