Allow binary-only references for compile-time constants. Like we do for binary-only annotations, this change allows binary-only references for compile-time constants. We don't actually need source in the GWT compiler, JDT embeds the constant value in the unit we do compile. http://gwt-code-reviews.appspot.com/1447825/ Review by: zundel@google.com git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@10329 8db76d5a-ed1c-0410-87a9-c151d255dfc7