Build file changes to create gwt-bikeshed.jar that can be used as an overlay
jar. Not included in dist.

Patch by: amitmanjhi
Review by: rjrjr (desk review), fabbott (tbr)


git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@7860 8db76d5a-ed1c-0410-87a9-c151d255dfc7