[gnome-system-log] build: make sure to update the submodule on autogen

[Cosimo Cecchi <cosimoc src gnome org>]

commit e6bcab4beb2e4d7cdd788be0802b7dee820735b5
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Thu Aug 30 14:12:20 2012 -0400

    build: make sure to update the submodule on autogen

 autogen.sh |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/autogen.sh b/autogen.sh
index d5dbcc9..88371f4 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -18,4 +18,6 @@ which gnome-autogen.sh || {
     exit 1
 }
 
+git submodule update --init --recursive
+
 USE_GNOME2_MACROS=1 . gnome-autogen.sh