Use OBJDIR instead of CURDIR. This unbreaks loading modules through

'make load' if an object dir was, like it is used in /sys/modules. I.e.

	cd /sys/modules/umass
	make obj
	make
	make load

works again without having to install the module.

If no objdir was used the module in the current directory is used.

sys/conf/kmod.mk

@@ -278,7 +278,7 @@ distribute:
 
 .if !target(load)
 load:	${PROG}
-	${KMODLOAD} -v ${.CURDIR}/${KMOD}.ko
+	${KMODLOAD} -v ${.OBJDIR}/${KMOD}.ko
 .endif
 
 .if !target(unload)