Adding presubmit target so Joel can use it, as his checkstyle setup is currently foobared (note, checkstyle info message will be updated in subsequent commit)
review by:fabbott

git-svn-id: https://google-web-toolkit.googlecode.com/svn/releases/1.6@4582 8db76d5a-ed1c-0410-87a9-c151d255dfc7