[CMake] Support running libc++abi tests in CrossWinToARMLinux cache file
Now that D71894 has landed, we're able to run libc++abi tests remotely.
For that we can use the same CMake command as before. The tests can be run using ninja check-cxxabi.
Reviewers: andreil99, vvereschaka, aorlov
Reviewed By: vvereschaka, aorlov
Subscribers: mgorny, kristof.beyls, ldionne, cfe-commits
Differential Revision: https://reviews.llvm.org/D72459