add emacs shell-script tagging

for files that don't start with a #! or end in .sh, the added tags
are nice for emacs users to automatically switch to the right mode.

Change-Id: If4b93e106191bc744ccad8420cef20e751cdf902
diff --git a/functions b/functions
index 1590166..0bbf477 100644
--- a/functions
+++ b/functions
@@ -1356,5 +1356,5 @@
 
 
 # Local variables:
-# -*- mode: Shell-script -*-
+# mode: shell-script
 # End: