[PATCH FOR REVIEW]: Don't copy plugin sources

[Andrew Haley]

Andrew John Hughes wrote:
> The attached patch avoids making a copy of the netscape.* plugin
> sources in rt, instead referencing them by path in the javac
> invocations.  This avoids the issue where the files are in rt and are
> then included in a release tarball, which breaks the --disable-plugin
> build.
> 
> Ok for commit to 1.6 branch and HEAD?
> 
> ChangeLog:
> 
> * Makefile.am: Reference netscape.* plugin sources rather than copying to rt.

OK, ta.

Andrew.