[grilo] build: Require vala to dist

[Bastien Nocera <hadess src gnome org>]

commit 9dc7a41f75eb3c32b30bb9975301189ec4d77cff
Author: Bastien Nocera <hadess hadess net>
Date:   Tue Jul 16 16:31:21 2013 +0200

    build: Require vala to dist
    
    Vala is needed to create the distribution tarball, otherwise
    files that would be used when --enable-vala is used against the
    tarball would fail because of missing files.

 Makefile.am |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index c404759..0fb95c9 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -47,7 +47,7 @@ DISTCLEANFILES = $(MAINTAINERCLEANFILES)
 
 EXTRA_DIST = ./m4/introspection.m4
 
-DISTCHECK_CONFIGURE_FLAGS=--enable-gtk-doc
+DISTCHECK_CONFIGURE_FLAGS=--enable-gtk-doc --enable-vala
 
 distclean-local:
        -rm -rf autom4te.cache