[gegl] operations/external: Fix buildfailure in distcheck

[Jon Nordby <jonnor src gnome org>]

commit 43cec281737a2995efabb75b06f274d50da47140
Author: Jon Nordby <jononor gmail com>
Date:   Wed Jan 21 03:25:37 2015 +0100

    operations/external: Fix buildfailure in distcheck

 operations/external/Makefile.am |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/operations/external/Makefile.am b/operations/external/Makefile.am
index 76d8d76..dd292b0 100644
--- a/operations/external/Makefile.am
+++ b/operations/external/Makefile.am
@@ -159,6 +159,7 @@ rgbe_save_la_CFLAGS = $(AM_CFLAGS) -I $(top_srcdir)/libs
 rgbe_save_la_LIBADD = $(op_libs) $(top_builddir)/libs/rgbe/librgbe.la
 
 BUILT_SOURCES = $(subst .c,.c.h,$(wildcard $(srcdir)/*.c))
+EXTRA_DIST += $(BUILT_SOURCES)
 
 opdir = $(libdir)/gegl- GEGL_API_VERSION@
 op_LTLIBRARIES = $(ops)