[pitivi] Use gstreamer common submodule now that they've switched

[Edward Hervey <edwardrv src gnome org>]

commit 76c3918e312d435cafe988bd994bb11a1c7f0e08
Author: Edward Hervey <bilboed bilboed com>
Date:   Thu Mar 19 17:49:43 2009 +0100

    Use gstreamer common submodule now that they've switched
---
 .gitmodules |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/.gitmodules b/.gitmodules
index 01268c0..a6b1eda 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,3 @@
 [submodule "common"]
 	path = common
-	url = git://git.pitivi.org/git/common.git
+	url = git://anongit.freedesktop.org/gstreamer/common