Use LDFLAGS when linking

Use LDFLAGS when linking the output binary to quiet QA warnings due to
missing link flags.

Upstream-Status: Pending

Signed-off-by: Scott Murray <scott.murray@konsulko.com>

--- a/Makefile	2019-11-05 11:08:11.060565285 +0000
+++ b/Makefile	2019-11-05 11:09:38.663570084 +0000
@@ -6,7 +6,7 @@
 objects = linc_parse_xml.o pcl_config.o sllin_config.o lin_config.o
 
 lin_config: $(objects)
-	$(CC) $(objects) $(LIBS) -o lin_config
+	$(CC) $(LDFLAGS) $(objects) $(LIBS) -o lin_config
 
 %.o : %.c %.h
 	$(CC) $(CFLAGS) $(LIBS) -c $< -o $@