mountd: explicitly link libubox (needed by libuci)

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 42972

package/system/mountd/patches/060-link_libubox.patch

+--- a/Makefile
++++ b/Makefile
+@@ -2,7 +2,7 @@ PROG=mountd
+ OBJS=main.o lib/log.o lib/sys.o lib/autofs.o lib/mount.o lib/timer.o lib/signal.o lib/ucix.o lib/led.o lib/fs.o lib/ucix.o
+ 
+ LDFLAGS?=
+-LDFLAGS+=-ldl -luci
++LDFLAGS+=-ldl -luci -lubox
+ 
+ CFLAGS?=
+ CFLAGS+= -Wall