etc/Makefile: remove modified config file in the clean target.
etc/Makefile: remove modified config file in the clean target.

--HG--
extra : convert_revision : xtraeme%40gmail.com-20090820020602-o2ki45yznf659a5q

ebfe/xbps,datenwolf/xbps,ebfe/xbps,datenwolf/xbps,datenwolf/xbps,ebfe/xbps,stpx/xbps,stpx/xbps,stpx/xbps