cube: Support runtime selection of WSI platform #107

Job	Run time
codegen	24s
android (armeabi-v7a)	35s
linux (gcc, g++, Debug, ubuntu-20.04)	1m 8s
android (arm64-v8a)	36s
chromium	1m 30s
linux (gcc, g++, Debug, ubuntu-22.04)	1m 8s
mac	10m 28s
linux (gcc, g++, Release, ubuntu-20.04)	54s
mingw	1m 37s
tools_codegen	51s
linux (gcc, g++, Release, ubuntu-22.04)	1m 4s
linux (clang, clang++, Debug, ubuntu-20.04)	54s
windows (Win32, Debug, windows-latest)	2m 25s
linux (clang, clang++, Release, ubuntu-22.04)	56s
windows (Win32, Release, windows-latest)	2m 14s
windows (x64, Debug, windows-latest)	2m 14s
windows (x64, Release, windows-latest)	1m 40s
	30m 38s

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