Add suppression to valgrind.supp for fun:FcConfigEvaluate.

Any allocation under FcConfigValues will be 'lost'.
Update the valgrind suppression to reflect this.

Review URL: https://codereview.chromium.org/703893003
diff --git a/tools/valgrind.supp b/tools/valgrind.supp
index d96ada0..a7562dc 100644
--- a/tools/valgrind.supp
+++ b/tools/valgrind.supp
@@ -105,6 +105,7 @@
     font_config_bug_3
     Memcheck:Leak
     fun:*alloc
+    ...
     fun:FcConfigValues
     fun:FcConfigSubstituteWithPat
     fun:FcFontRenderPrepare