package makefiles: changed distclean to delete output directorties for all targets

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@44128 4005530d-fff6-0310-9dd1-cebe43e6787f
make help: distclean

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@44129 4005530d-fff6-0310-9dd1-cebe43e6787f
make help: distclean

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@44130 4005530d-fff6-0310-9dd1-cebe43e6787f