Suppress jump on uninitialized value noticed by Valgrind on Mac in...

tools/valgrind/suppressions_mac.txt

 {
    # See http://code.google.com/p/chromium/issues/detail?id=9565
    # This should have been handled by platform-specific suppression.
    # Remove this when https://bugs.kde.org/show_bug.cgi?id=188572 is fixed
    setenv() leaks on Mac intentionally.
    Memcheck:Leak
    ...
    fun:__setenv
    fun:setenv$UNIX2003
 }
@@ skipping 153 matching lines @@
    # (was: http://crbug.com/9563 )
    bug_11333
    Memcheck:Leak
    fun:malloc
    fun:stdSmartNewPtr
    fun:stdSmartNewHandle
    fun:IOCreateAndOpen
    fun:ScratchInit
    fun:CMOpenOrNewAccess
 }
+{
+   bug_12525
+   Memcheck:Cond
+   ...
+   fun:gldGetTextureLevel
+   fun:gldUpdateDispatch
+   fun:glBegin_Exec
+   fun:fe_gl_begin
+   fun:fe_tree_render_apply_1
+   fun:apply_tile_callback
+   fun:fe_gl_texture_tile_map
+   fun:image_buffer_texture_tile_map
+   fun:fe_texture_tile_map
+}
+{
+   # Jump on uninitialized value in OpenGL.framework's GLEngine.bundle
+   bug_12528
+   Memcheck:Cond
+   ...
+   fun:ripc_DrawShading
+   fun:CGContextDrawShading
+}