.gitreview: update repo url to new location

Change-Id: Ic08e308e3b6f9dda35c95da4628268ccd2b6cfaa
diff --git a/.gitreview b/.gitreview
index ee67509..1f71dcf 100644
--- a/.gitreview
+++ b/.gitreview
@@ -1,3 +1,3 @@
 [gerrit]
 host=gerrit.osmocom.org
-project=openbsc
+project=osmo-mgw