Remove libs/Makelib.rules on distclean.

Makefile.in

diff --git a/Makefile.in b/Makefile.in
index 3bf57fd..5dfcc1a 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -147,7 +147,7 @@
 	$(RM) wine
 
 distclean: clean
-	$(RM) config.* configure.lineno TAGS tags Make.rules dlls/Makedll.rules dlls/Maketest.rules programs/Makeprog.rules include/config.h
+	$(RM) config.* configure.lineno TAGS tags Make.rules dlls/Makedll.rules dlls/Maketest.rules programs/Makeprog.rules libs/Makelib.rules include/config.h
 	$(RM) -r autom4te.cache
 	$(RM) `find . \( -name Makefile -o -size 0 \) -print`