lockfile-progs: fix make dependency

Based on patch by Sergio Monteiro Basto <sergio@sergiomb.no-ip.org>.

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

package/lockfile-progs/lockfile-progs.mk

@@ -6,6 +6,7 @@
 LOCKFILE_PROGS_VERSION = 0.1.15
 LOCKFILE_PROGS_SOURCE = lockfile-progs_$(LOCKFILE_PROGS_VERSION).tar.gz
 LOCKFILE_PROGS_SITE = $(BR2_DEBIAN_MIRROR)/debian/pool/main/l/lockfile-progs/
+LOCKFILE_PROGS_DEPENDENCIES = liblockfile
 
 LOCKFILE_BINS = \
 	$(addprefix lockfile-,check create remove touch) \