Add removal of new files when make clean is called

Author: fyshhh

Makefile.in

@@ -313,6 +313,8 @@ clean: tidy
 	- cd contrib && $(MAKE) clean
 	- cd test && $(MAKE) clean
 	- cd manpages && ${MAKE} clean
+	- rm .gitid
+	- rm include/mana-version.h
 	- if test -z "$$DMTCP_TMPDIR"; then \
 	   if test -z "$$TMPDIR"; then \
 	     DMTCP_TMPDIR=/tmp/dmtcp-$$USER@`/bin/hostname`; \