sync-webkit-git: a better message when you're not on the right branch
sync-webkit-git: a better message when you're not on the right branch

Review URL: http://codereview.chromium.org/235056

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@27560 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser