Updates the reference api for Api Checker to 2.1. Fixes 2 small bugs in Api Checker. Patch by: amitmanjhi Review by: jat Review at http://gwt-code-reviews.appspot.com/1095801 git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@9210 8db76d5a-ed1c-0410-87a9-c151d255dfc7