[PATCH] [lsan] Add suppression support.

[Alexander Potapenko]

  LGTM with a nit.


================
Comment at: lib/lsan/lsan_common.cc:43
@@ -40,2 +42,3 @@
   f->exitcode = 23;
+  f->suppressions="";
   f->use_registers = true;
----------------
Please add spaces around "="


http://llvm-reviews.chandlerc.com/D1060

BRANCH
  feat/lsan/suppressions

ARCANIST PROJECT
  compiler-rt