Fix build error for mbtk

Change-Id: I66b581decbd81a7db90d8ba379bfb7e04c049c68
diff --git a/mbtk/liblynq_lib/Makefile b/mbtk/liblynq_lib/Makefile
index 44349a0..6205103 100755
--- a/mbtk/liblynq_lib/Makefile
+++ b/mbtk/liblynq_lib/Makefile
@@ -38,6 +38,7 @@
 
 $(dtarget): $(OBJS)
 	$(CC) $(CFLAGS) $(LIB_DIR) $(LIBS) $(OBJS) -o $@
+	cp $@ $(BUILD_ROOT)/rootfs/lib
 
 %.o:%.c
 	$(CC) $(CFLAGS) $(INC_DIR) $(DEFINE) -c $< -o $@