Add consistent Emacs and vim mode lines

basic/Module_basic.mk

@@ -1,3 +1,4 @@
+# -*- Mode: makefile; tab-width: 4; indent-tabs-mode: t -*-
 #*************************************************************************
 #
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
@@ -36,4 +37,4 @@ $(eval $(call gb_Module_add_targets,basic,\
 	StaticLibrary_sample \
 ))
 
-# vim: set noet sw=4:
+# vim: set noet sw=4 ts=4: