[PATCH] Tests and interface for LeakSanitizer.

[Sergey Matveev]

  > Was this new sanitizer discussed anywhere (I don't see anything in my mail)?

  Not online, no. I'm going to write up some kind of document in the next few days.
  This is a leak checking module similar to the heap checker from gperftools, intended to be used primarily on top of asan/msan. We're rolling it out as a standalone tool first because it's easier that way.

http://llvm-reviews.chandlerc.com/D677

BRANCH
  lsan_interface_and_tests

ARCANIST PROJECT
  compiler-rt