package/config: create .depend in object directory

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/config/Makefile

@@ -5,9 +5,9 @@ srctree := .
 
 include Makefile.kconfig
 #HOSTCFLAGS+=-Dinline="" -include foo.h
--include .depend
-.depend: $(wildcard *.h *.c)
-	$(HOSTCC) $(HOST_EXTRACFLAGS) $(HOSTCFLAGS) -MM *.c > .depend 2>/dev/null || :
+-include $(obj)/.depend
+$(obj)/.depend: $(wildcard *.h *.c)
+	$(HOSTCC) $(HOST_EXTRACFLAGS) $(HOSTCFLAGS) -MM *.c > $@ 2>/dev/null || :
 
 __hostprogs := $(sort $(hostprogs-y) $(hostprogs-m))
 host-csingle := $(foreach m,$(__hostprogs),$(if $($(m)-objs),,$(m)))