Widen suppression for gfx::GLContextOSMesa::MakeCurrent leak

TBR=piman@chromium.org
BUG=148477

Review URL: https://codereview.chromium.org/15758005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@202351 0039d316-1c4b-4281-b951-d872f2087c98

tools/heapcheck/suppressions.txt

@@ -215,7 +215,7 @@
    ...
    fun:gfx::GLContextOSMesa::MakeCurrent
    ...
-   fun:webkit::gpu::GLInProcessContext::PumpCommands
+   fun:webkit::gpu::GLInProcessContext::*
 }
 {
    bug_148477_b