[grilo] build: Add support for Vala 0.22

[Juan A. Suarez Romero <jasuarez src gnome org>]

commit 1114ecd0afa6c017f3bca79f5b8e31a65ebee781
Author: Juan A. Suarez Romero <jasuarez igalia com>
Date:   Wed Sep 18 11:39:25 2013 +0200

    build: Add support for Vala 0.22

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 84dc71d..ddb493d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -228,7 +228,7 @@ AC_ARG_ENABLE([vala],
 AC_MSG_RESULT([$enable_vala])
 if test "x$enable_vala" != "xno"; then
        valapkg=""
-       m4_foreach([VERSION], [[0.12], [0.14], [0.16], [0.18], [0.20]],
+       m4_foreach([VERSION], [[0.12], [0.14], [0.16], [0.18], [0.20], [0.22]],
                   [PKG_CHECK_EXISTS([ libvala-VERSION ],
                            [ valapkg="libvala-VERSION" ])
                   ])