Widen one TSan suppression to make TSan/content greener

BUG=79050
TBR=thestig
Review URL: http://codereview.chromium.org/8703001

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@111581 0039d316-1c4b-4281-b951-d872f2087c98

tools/valgrind/tsan/suppressions.txt

@@ -395,8 +395,7 @@
 {
   bug_79050 Test to detect read contention & benign race
   ThreadSanitizer:Race
-  fun:Replace_memcpy
-  fun:memcpy
+  ...
   fun:::MockDataFetcher::GetGamepadData
   fun:gamepad::Provider::DoPoll
 }