[PATCH] [lsan] Make LSan ignore memory poisoned by ASan.

[Alexey Samsonov]

  These tests are expected to pass only under ASan, it's better to specify that. Maybe even on test-case basis: get rid of ASanOnly directory, add "asa" config.available_features and //REQUIRES: line to test case.

http://llvm-reviews.chandlerc.com/D2359

BRANCH
  feat/is_poisoned

ARCANIST PROJECT
  compiler-rt