Add git-review config

Change-Id: Ie8ea609827ae4da6659b64c25f0c743770e0cc07
diff --git a/.gitreview b/.gitreview
new file mode 100644
index 0000000..ffc7ed4
--- /dev/null
+++ b/.gitreview
@@ -0,0 +1,3 @@
+[gerrit]
+host=gerrit.osmocom.org
+project=osmo-ttcn3-hacks