Tweak MultiTestRunner --path argument.
 - Accept multiple values instead of embedding separator.
 - Make sure this gets used when searching for 'clang' binary.
 - Switch makefiles to using --path to stay in sync with cmake.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@77234 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed