Remove vtysh_cmd.c from the repository.
Add dependency on rebuild target for vtysh_cmd.c to Makefile.am
diff --git a/vtysh/Makefile.am b/vtysh/Makefile.am
index 4327379..2b04e70 100644
--- a/vtysh/Makefile.am
+++ b/vtysh/Makefile.am
@@ -20,3 +20,5 @@
 
 rebuild:
 	./extract.pl ../zebra/*.c ../ripd/*.c ../ripngd/*.c ../ospfd/*.c ../ospf6d/*.c ../bgpd/*.c ../lib/keychain.c ../lib/routemap.c ../lib/filter.c ../lib/plist.c >vtysh_cmd.c
+
+vtysh_cmd.c: rebuild