Add a gerrit CLI to ./development scripts

./development/aosp.sh help to see full help text.

This provides querying, checkout, rebase and prune functionality on top
of repo that would normally require interacting with the Gerrit UI.

Test: ./development/aosp.sh
Change-Id: I755b5f154ed653b535e05f0b835c4d787e70672f
diff --git a/development/OWNERS b/development/OWNERS
new file mode 100644
index 0000000..9dc1d6d
--- /dev/null
+++ b/development/OWNERS
@@ -0,0 +1 @@
+per-file aosp.sh = [email protected]