Adjust app.yaml application name to match appspot instance.

This switches the application name to chromium-reviewbot, which is the
name of our appengine instance.

BUG=None
R=agable@chromium.org

Review URL: https://codereview.chromium.org/23601003

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/reviewbot@219789 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/app.yaml b/app.yaml
index 3a6d210..1449a38 100644
--- a/app.yaml
+++ b/app.yaml
@@ -1,4 +1,4 @@
-application: reviewbot
+application: chromium-reviewbot
 version: 1
 runtime: python27
 api_version: 1