[vala] Add some missing files to EXTRA_DIST

[Rico Tzschichholz <ricotz src gnome org>]

commit 7449e9605468cbcd1bc344cb3845a3a4efc7b060
Author: Rico Tzschichholz <ricotz t-online de>
Date:   Sun Jan 22 18:22:53 2012 +0100

    Add some missing files to EXTRA_DIST

 vapigen/Makefile.am |    9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletions(-)
---
diff --git a/vapigen/Makefile.am b/vapigen/Makefile.am
index dd2a49f..407a703 100644
--- a/vapigen/Makefile.am
+++ b/vapigen/Makefile.am
@@ -74,7 +74,14 @@ pkgconfig_DATA = vapigen PACKAGE_SUFFIX@.pc
 vapigen PACKAGE_SUFFIX@.pc: vapigen.pc
 	cp $< $@
 
-EXTRA_DIST = $(vapigen_VALASOURCES) $(vapicheck_VALASOURCES) vapigen.vala.stamp vapicheck.vala.stamp
+EXTRA_DIST = \
+	$(vapigen_VALASOURCES) \
+	$(vapicheck_VALASOURCES) \
+	Makefile.vapigen \
+	vapigen.m4 \
+	vapigen.vala.stamp \
+	vapicheck.vala.stamp \
+	$(NULL)
 
 CLEANFILES = \
 	vapigen PACKAGE_SUFFIX@.pc