Widen leak suppression for intermittent WebKit leak.

tools/valgrind/memcheck/suppressions.txt

 # There are four kinds of suppressions in this file.
 # 1. third party stuff we have no control over
 #
 # 2. intentional unit test errors, or stuff that is somehow a false positive
 # in our own code, or stuff that is so trivial it's not worth fixing
 #
 # 3. Suppressions for real chromium bugs that are not yet fixed.
 # These should all be in chromium's bug tracking system (but a few aren't yet).
 # Periodically we should sweep this file and the bug tracker clean by
 # running overnight and removing outdated bugs/suppressions.
@@ skipping 4312 matching lines @@
    fun:g_object_newv
    fun:g_object_new
    fun:_gdk_window_impl_new
    fun:gdk_window_ensure_native
    fun:gdk_x11_drawable_get_xid
    fun:_ZN19TestWebViewDelegate20CreatePluginDelegateERK8FilePathRKSs
 }
 {
    bug_96568a
    Memcheck:Leak
-   fun:realloc
+   fun:*alloc
    ...
-   fun:HB_OpenTypeShape
+   fun:HB_OpenType*
    ...
    fun:HB_ShapeItem
    fun:_ZN7WebCore21ComplexTextController11shapeGlyphsEv
    fun:_ZN7WebCore21ComplexTextController13nextScriptRunEv
 }
 {
    bug_96568b
    Memcheck:Leak
    ...
    fun:HB_NewFace
@@ skipping 992 matching lines @@
    obj:/lib/libselinux.so.1
    obj:/lib/libselinux.so.1
 }
 {
    bug_todo_grep
    Memcheck:Leak
    fun:malloc
    obj:/bin/grep
    obj:/bin/grep
 }