[PATCH] [lsan] Add leak_check_at_exit flag.

[Alexey Samsonov]

  LGTM


================
Comment at: lib/lsan/lit_tests/TestCases/leak_check_at_exit.cc:12
@@ +11,3 @@
+int main(int argc, char *argv[]) {
+  printf("printf to break optimization\n");
+  if (argc > 1)
----------------
Do you really need this printf here?


http://llvm-reviews.chandlerc.com/D1258

BRANCH
  feat/detect_leaks_at_exit

ARCANIST PROJECT
  compiler-rt