[longomatch] Fix make distcheck

[Andoni Morales Alastruey <amorales src gnome org>]

commit 536448b16dc99aa8f280f35a9da81cdaa9bbac93
Author: Andoni Morales Alastruey <ylatuya gmail com>
Date:   Wed Jun 26 20:06:56 2013 +0200

    Fix make distcheck

 images/Makefile.am |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/images/Makefile.am b/images/Makefile.am
index 154a114..fb3c6b0 100644
--- a/images/Makefile.am
+++ b/images/Makefile.am
@@ -8,4 +8,7 @@ DISTCLEANFILES =\
        stock_draw-circle-unfilled.png \
        stock_draw-line-45.png \
        48x48/longomatch.svg \
-       scalable/longomatch.svg
+       scalable/longomatch.svg \
+       goal_background.svg \
+       field_background.svg \
+       half_field_background.svg