[gtkglext] Add DISTCHECK_CONFIGURE_FLAGS.

[Ralf Corsépius <rcorsepius src gnome org>]

commit ba65973f58eba81eade5bd25d6f0beb994c7ebce
Author: Ralf Corsepius <rcorsepius src gnome org>
Date:   Tue Dec 29 06:28:37 2009 +0100

    Add DISTCHECK_CONFIGURE_FLAGS.

 Makefile.am |    4 +---
 1 files changed, 1 insertions(+), 3 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index fa2bd8a..ab78753 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -3,8 +3,8 @@
 
 SUBDIRS = gdk gtk docs examples
 
-# tools want this on a single line
 ACLOCAL_AMFLAGS = -I m4macros
+DISTCHECK_CONFIGURE_FLAGS = --enable-gtk-doc
 
 EXTRA_DIST = \
 	README.win32			\
@@ -64,8 +64,6 @@ DISTCLEANFILES = \
 	gtkglext-$(GDK_TARGET)-$(API_VER)-uninstalled.pc	\
 	gtkglext-$(API_VER)-uninstalled.pc
 
-.PHONY: ChangeLog
-
 ChangeLog:
 	@echo Creating $@
 	@if test -d "$(srcdir)/.git"; then \