linux

vulkan system dep: determine version on cross builds #17058

Job	Run time
Arch Linux	12m 6s
Arch / PyPy	12m 9s
CUDA (on Arch)	7m 7s
Ubuntu Rolling (gcc, g++)	1s
Fedora	11m 40s
Ubuntu Rolling (--unity=on -Ddefault_library=static, --no-unittests, gcc, g++)	7m 30s
Gentoo	12m 7s
Ubuntu Rolling (-Ddefault_library=both, --no-unittests, gcc, g++)	9m 32s
OpenSUSE	11m 47s
Ubuntu Rolling (clang, clang++)	3m 54s
Ubuntu Bionic	11m 39s
Ubuntu Rolling (--unity=on, --no-unittests, clang, clang++)	4m 58s
Ubuntu Rolling (--cross ubuntu-armhf.json --cross linux-mingw-w64-64bit.json, 0, gcc, g++)	9m 44s
Ubuntu Rolling (--cross ubuntu-armhf.json --cross linux-mingw-w64-64bit.json, --unity=on, gcc, g++)	11m 7s
	2h 5m 21s

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