Adding the suffix ".if.enabled" to emma ant targets to avoid confusion.  The targets are noops if emma.enabled is not defined.

Patch by: jlabanca
Review by: rjrjr



git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@6284 8db76d5a-ed1c-0410-87a9-c151d255dfc7