Add one more suppression for a data race in libjingle

BUG=25913
TBR=dank
Review URL: http://codereview.chromium.org/343004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@30247 0039d316-1c4b-4281-b951-d872f2087c98

tools/valgrind/tsan/suppressions.txt

@@ -108,11 +108,17 @@
 }
 
 {
-  bug_25913 (libjingle)
+  bug_25913 (libjingle) (1)
   ThreadSanitizer:Race
   fun:*talk_base*MessageQueue*Stop*
 }
 
+{
+  bug_25913 (libjingle) (2)
+  ThreadSanitizer:Race
+  fun:*talk_base*MessageQueue*Get*
+}
+
 ############################
 # Data races in tests