[gjs: 3/5] valgrind: Suppress GTK memory leaks

[Cosimo Cecchi <cosimoc src gnome org>]

commit 78862d7d700041015a812da2245f30f562e9456f
Author: Philip Chimento <philip chimento gmail com>
Date:   Tue Mar 27 22:21:41 2018 -0700

    valgrind: Suppress GTK memory leaks
    
    I confirmed that these happen in a regular C program that creates and
    destroys a GtkWindow, so they are not due to GJS.

 installed-tests/extra/gjs.supp | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)
---
diff --git a/installed-tests/extra/gjs.supp b/installed-tests/extra/gjs.supp
index 3dfb2d7a..4d399f09 100644
--- a/installed-tests/extra/gjs.supp
+++ b/installed-tests/extra/gjs.supp
@@ -109,8 +109,21 @@
    fun:malloc
    fun:g_malloc
    ...
-   fun:gtk_style_new
-   fun:gtk_widget_get_default_style
+   fun:gtk_css_node_declaration_make_writable
+   ...
+   fun:gtk_style_constructed
+}
+
+{
+   gtk-style-context2
+   Memcheck:Leak
+   match-leak-kinds: possible
+   fun:malloc
+   fun:g_malloc
+   ...
+   fun:gtk_css_node_declaration_make_writable_resize
+   ...
+   fun:gtk_style_constructed
 }
 
 # https://bugs.freedesktop.org/show_bug.cgi?id=105466