Fix PR28831 - Bad logic around CMAKE_OSX_SYSROOT and CMAKE_OSX_ARCHITECTURES.

See https://llvm.org/bugs/show_bug.cgi?id=28831 for more information about
the changes.


git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@280037 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed