Modify the unittests Makefiles so that they don't rebuild parts of LLVM just to
run the tests. Most of this was stolen from the llvm/test Makefiles.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61648 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed