spirv-cross: Update to latest Git #54

Job	Run time
build (win-libs-vc14-x64, Visual Studio 16 2019, Release, windows-2019, -A x64, thirdparty-win64....	23m 33s
build (win-libs-vc14, Visual Studio 16 2019, Release, windows-2019, -A Win32, thirdparty-win32.zip)	23m 9s
build (darwin-libs-a, Unix Makefiles, Release, macos-latest, -DCMAKE_OSX_ARCHITECTURES="arm64;x86...	18m 32s
build (android-libs-arm64, Unix Makefiles, Release, ubuntu-latest, -DCMAKE_TOOLCHAIN_FILE=$ANDROI...	15m 6s
build (android-libs-arm, Unix Makefiles, Release, ubuntu-latest, -DCMAKE_TOOLCHAIN_FILE=$ANDROID_...	14m 34s
build (android-libs-x86_64, Unix Makefiles, Release, ubuntu-latest, -DCMAKE_TOOLCHAIN_FILE=$ANDRO...	14m 43s
build (android-libs-x86, Unix Makefiles, Release, ubuntu-latest, -DCMAKE_TOOLCHAIN_FILE=$ANDROID_...	14m 50s
	2h 4m 27s

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