Update the script to target M3 in response to Roo's commit 476ec5f35a3d8fc65b66834527ca1

Patch by: amitmanjhi
Review by: rjrjr


git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@8512 8db76d5a-ed1c-0410-87a9-c151d255dfc7