Relink subdirectory objects on Makefile.in/Make.rules.in change.

Make.rules.in

diff --git a/Make.rules.in b/Make.rules.in
index b1f0616..19b4b8b 100644
--- a/Make.rules.in
+++ b/Make.rules.in
@@ -141,7 +141,7 @@
 
 # Rule for main module
 
-$(MODULE).o: $(OBJS)
+$(MODULE).o: $(OBJS) Makefile.in $(TOPSRCDIR)/Make.rules.in
 	$(LDCOMBINE) $(OBJS) -o $(MODULE).o
 
 # Rules for makefile