[gnumeric] tests: one more fontconfig leak suppression

[Morten Welinder <mortenw src gnome org>]

commit ec68521ecd25333e0748d9763a03317ec2547a2e
Author: Morten Welinder <terra gnome org>
Date:   Fri Nov 1 20:10:28 2019 -0400

    tests: one more fontconfig leak suppression

 test/common.supp | 9 +++++++++
 1 file changed, 9 insertions(+)
---
diff --git a/test/common.supp b/test/common.supp
index 1669dc944..52763b434 100644
--- a/test/common.supp
+++ b/test/common.supp
@@ -876,6 +876,15 @@
    fun:FcValueListCreate
 }
 
+{
+   FONTCONFIG/VALUES_LEAK2
+   Memcheck:Leak
+   match-leak-kinds: possible
+   fun:malloc
+   fun:strdup
+   fun:FcValueSave
+}
+
 # See https://bugs.freedesktop.org/show_bug.cgi?id=87898
 {
    _CAIRO_RECORDING_SURFACE_SNAPSHOT_LEAK