adjust suppression for uninit at ProcessOutgoingMessages

BUG=371991
TBR=bruening@chromium.org

Review URL: https://codereview.chromium.org/328453002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@275834 0039d316-1c4b-4281-b951-d872f2087c98

tools/valgrind/drmemory/suppressions_full.txt

@@ -2131,7 +2131,7 @@ name=bug_371991
 system call NtWriteFile parameter #5
 KERNELBASE.dll!WriteFile
 KERNEL32.dll!WriteFile*
-ipc.dll!IPC::Channel::ChannelImpl::ProcessOutgoingMessages
+*!IPC::Channel*::ProcessOutgoingMessages
 
 UNINITIALIZED READ
 name=bug_372254