Set meaningful context for GitHub status reporter.

whitequark · whitequark · commit a9c96504d61f · 2017-10-01T19:25:25.000Z
diff --git a/master.cfg b/master.cfg
@@ -828,7 +828,8 @@ c['status'].append(
     GitHubStatus(
         token=secrets['github']['status_api_token'],
         repoOwner='m-labs',
-        repoName=WithProperties('%(github_repo_name:~)s')))
+        repoName=WithProperties('%(github_repo_name:~)s'),
+        context='m-labs/buildbot'))
 
 ####### PROJECT IDENTITY
 
