lit: Add --repeat=N option, for running each test N times.
 - Currently just useful for timing, although it could be extended as one (bad) way to deal with flaky tests.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@88827 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed