Update Makefile to use build-compiler (CC) for LLDB testing
- Should allow tests to run without 'clang' installed



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@175521 91177308-0d34-0410-b5e6-96231b3b80d8
Update TestVBool Makefile to allow building test program with gcc
- do not pass (incompatible option) -stdlib=libstdc++ option if using GCC as test compiler



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@175522 91177308-0d34-0410-b5e6-96231b3b80d8