[tests] Add support for a link_flags lit parameter.
 - This is useful for testing with custom ABI libraries.
 - Patch by Michael van der Westhuizen.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@174997 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed