MultiTestRunner.py improvements.
 - Tweak output directories for temp files, derive the temporary base from the
   test's parent directory name, and the test name (instead of the whole path).


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@77059 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed