[gegl] build: Fix multiple definition of CLEANFILES

[Mukund Sivaraman <muks src gnome org>]

commit 31c2491aba905738e6ff3534129071763f698f2a
Author: Mukund Sivaraman <muks banu com>
Date:   Mon Sep 5 18:12:34 2011 +0530

    build: Fix multiple definition of CLEANFILES

 gegl/Makefile.am |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gegl/Makefile.am b/gegl/Makefile.am
index 7a58137..718447e 100644
--- a/gegl/Makefile.am
+++ b/gegl/Makefile.am
@@ -141,7 +141,7 @@ endif # HAVE_INTROSPECTION
 #
 # setup autogeneration dependencies
 gen_sources = xgen-tec
-CLEANFILES = $(gen_sources)
+CLEANFILES += $(gen_sources)
 
 gegl-enums.c: $(srcdir)/gegl-enums.h
 	glib-mkenums \