[gimp] Makefile.am: Add gtk-doc.make to EXTRA_DIST

[Michael Natterer <mitch src gnome org>]

commit dfd2998e60635184b7478ffa443db3f778c37243
Author: Michael Natterer <mitch gimp org>
Date:   Wed Aug 20 17:24:57 2014 +0200

    Makefile.am: Add gtk-doc.make to EXTRA_DIST

 Makefile.am |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index 6258b57..924a23c 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -71,7 +71,8 @@ EXTRA_DIST = \
        authors.xml             \
        authors.xsl             \
        config.h.win32          \
-       gimp-zip.in
+       gimp-zip.in             \
+       gtk-doc.make
 
 
 DISTCHECK_CONFIGURE_FLAGS = --enable-gtk-doc