Heapchecker: Widen a suppression.

BUG=83561
TEST=none
TBR=jhawkins
Review URL: http://codereview.chromium.org/7634007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@96476 0039d316-1c4b-4281-b951-d872f2087c98

tools/heapcheck/suppressions.txt

@@ -1530,6 +1530,7 @@
    fun:net::HostResolverImpl::Job::DoLookup
    fun:void DispatchToMethod
    fun:RunnableMethod::Run
+   ...
    fun:base::::WorkerThread::ThreadMain
 }
 {