add external libs to the suppression file

These are not built with Asan/Lsan and therefore are most likely false
positives.

Change-Id: I76ae7e4d023ab6401a34b61dbc9a05bc75327253

leak-suppress.txt

@@ -25,3 +25,15 @@ leak:ResMgr::CreateResMgr
 
 # bridge's RTTI information, leaked knowingly
 leak:RTTI::getRTTI
+
+# ignore glib reported leaks, most likely false positives
+# glib not built with asan/lsan
+leak:libglib
+
+# ignore fontconfig reported leaks, most likely false positives
+# fontconfig not built with asan/lsan
+leak:libfontconfig.so
+
+# ignore libGL related leaks, most likely false positives
+# libGL is not built with asan/lsan
+leak:libGL.so