wrappers: add CMake toolchain files #1206

Job	Run time
prepare	5s
macos	5h 50m 6s
msys2 (mingw64)	2h 3m 49s
linux-asserts	0s
msys2 (clang64)	1h 43m 14s
linux	2h 44m 37s
linux-test-cross-build-ffmpeg	0s
linux-cross-aarch64	2h 51m 52s
linux-cross-windows (i686, ucrt)	2h 57m 0s
linux-cross-windows (x86_64, ucrt)	2h 59m 59s
linux-cross-windows (armv7, ucrt)	2h 52m 23s
linux-cross-windows (aarch64, ucrt)	2h 55m 25s
test-ffmpeg	0s
test-libcxx	0s
test-openmp	0s
test-compiler-rt	0s
test-toolchain	0s
upload-nightly	0s
	1d 2h 58m 30s

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