Fixes accidental generation of drvers/dahdi/$(obj)

If we tell Kbuild (at least of some versions) that the host program is
$obj/makefw , it will attempt to create the full path of $(obj) for it
under the current $(obj).


git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9630 a0bf4364-ded3-4de4-8d8a-66a801d63aff

drivers/dahdi/Kbuild

@@ -135,7 +135,7 @@ endif
 $(obj)/pciradio.o: $(obj)/radfw.h
 $(obj)/tor2.o: $(obj)/tor2fw.h
 
-hostprogs-y := $(obj)/makefw
+hostprogs-y := makefw
 
 $(obj)/tor2fw.h: $(src)/tormenta2.rbt $(obj)/makefw 
 	$(obj)/makefw $< tor2fw > $@