Update a couple of suppression rules.

This change updates a couple of suppression rules started after switching "Chromium OS" memory bots from i386 to x86_64.

TBR=thakis
BUG=68069,119677
TEST=make the "Chromium OS UI (valgrind)" bots and the "Chromium OS Heapcheck" bot greener.
Review URL: https://chromiumcodereview.appspot.com/10196008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@133610 0039d316-1c4b-4281-b951-d872f2087c98

tools/heapcheck/suppressions.txt

@@ -144,8 +144,9 @@
    bug_119677
    Heapcheck:Leak
    fun:XRRRootToScreen
-   fun:??
    fun:MonitorChangeObserverX11
+   fun:aura::Env::Init
+   fun:aura::Env::GetInstance
 }
 
 #-----------------------------------------------------------------------

tools/valgrind/memcheck/suppressions.txt

@@ -2609,8 +2609,7 @@
    Memcheck:Leak
    fun:malloc
    fun:XextCreateExtension
-   obj:*
-   obj:*
+   ...
    fun:_ZN3gfx12GLSurfaceGLX16InitializeOneOffEv
    fun:_ZN3gfx9GLSurface24InitializeOneOffInternalEv
    fun:_ZN3gfx9GLSurface16InitializeOneOffEv