[gnumeric] Tests: ignore a pixman/valgrind problem

[Morten Welinder <mortenw src gnome org>]

commit a883a1e4f162f3a56f89f5c0cf8830e11236b007
Author: Morten Welinder <terra gnome org>
Date:   Wed Dec 30 10:26:40 2015 -0500

    Tests: ignore a pixman/valgrind problem

 test/common.supp |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)
---
diff --git a/test/common.supp b/test/common.supp
index a630a3f..f413ca7 100644
--- a/test/common.supp
+++ b/test/common.supp
@@ -911,3 +911,14 @@
    ...
    fun:gobject_init_ctor
 }
+
+{
+   pixman_strangeness
+   Memcheck:Cond
+   fun:core_combine_over_u_sse2_mask
+   fun:sse2_combine_over_u
+   fun:general_composite_rect
+   fun:pixman_image_composite32
+   fun:_inplace_spans
+   fun:blit_a8
+}