disabling gconftool-2 --makefile-install-rule when using $DESTDIR

[jacob berkman <jacob ximian com>]

hello havoc,

in an rpm build, it doesn't make sense for the gconftool install rule to
actually be run.

i think the best place to do this would be in gconftool itself, rather
than hacking up Makefile / .m4 files, but was wondering if you had any
insights on this.

jacob
-- 
"In fact, can you imagine anything more terrifying than a zombie clown?"
	-- moby