[gitg] Update valac dependency

[Adam Dingle <adamd src gnome org>]

commit 627fae4ed5922aa78e3343a95410eb6f84b2241f
Author: Adam Dingle <adam yorba org>
Date:   Mon Jun 3 21:33:38 2013 -0400

    Update valac dependency

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 937c56c..22bf03d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -37,7 +37,7 @@ AC_PROG_MAKE_SET
 AC_PATH_PROG(GZIP, gzip)
 
 AM_PATH_PYTHON([3.2.3])
-AM_PROG_VALAC([0.16.0])
+AM_PROG_VALAC([0.20.1.19])
 
 AC_PATH_PROG(GLIB_MKENUMS, glib-mkenums)
 AC_PATH_PROG(GLIB_COMPILE_RESOURCES, glib-compile-resources)