[PATCH] [libcxx] Consolidate new/delete replacement in tests and disable it when using sanitizers.

[Jonathan Roelofs]

================
Comment at: test/support/count_new.hpp:48
@@ +47,3 @@
+        --new_called;
+        ++delete_called;
+    }
----------------
Hmm... I just realized that these have really weird names. new_called doesn't count the number of times new was called, rather it counts the number of objects allocated by new that haven't been deleted yet (i.e. the tests don't care if there are extra allocations and deallocations between checks).

http://reviews.llvm.org/D6562