Add gerrit settings

Make it simple to setup and use this repo with 'git review' command.

Change-Id: I04aeee90641555df19e969f925474ec6f9a23354
diff --git a/.gitreview b/.gitreview
new file mode 100644
index 0000000..2e575db
--- /dev/null
+++ b/.gitreview
@@ -0,0 +1,3 @@
+[gerrit]
+host=gerrit.osmocom.org
+project=libosmo-abis