TSAN Race observed in LoggingTest_Dcheck_Test

Adds suppression for leak in LoggingTest_Dcheck_Test

BUG=116559
TEST=LoggingTest.Dcheck
R=akalin@chromium.org

Review URL: https://chromiumcodereview.appspot.com/9586010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@124676 0039d316-1c4b-4281-b951-d872f2087c98

tools/valgrind/tsan/suppressions.txt

@@ -856,3 +856,9 @@
   ThreadSanitizer:Race
   fun:talk_base::Event::EnsureInitialized
 }
+{
+  bug_116559
+  ThreadSanitizer:Race
+  fun:logging::::LoggingTest_Dcheck_Test::TestBody
+  fun:testing::internal::HandleSehExceptionsInMethodIfSupported
+}