Adds com/google/gwt/soyc/** to standalone compiler.

There are now direct code references from the  standalone compiler to the soyc package, fixing the build rules to reflect this dependency.

Review by: kprobst (desk)


git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@6395 8db76d5a-ed1c-0410-87a9-c151d255dfc7