Add <= to lispwords
<= is the closest thing we have to defun in this language so we should indent it
properly.
    
        | author | 
        Steve Losh <steve@stevelosh.com> | 
    
    
        | date | 
        Fri, 22 Jan 2016 10:45:09 +0000 | 
    
    
    
        | parents | 
        b46964f00daf 
 | 
    
    
        | children | 
        7959df37f096
 | 
    
    
        | branches/tags | 
        (none) | 
    
    
        | files | 
        ftplugin/gdl.vim  | 
    
Changes
    
--- a/ftplugin/gdl.vim	Fri Jan 22 10:40:44 2016 +0000
+++ b/ftplugin/gdl.vim	Fri Jan 22 10:45:09 2016 +0000
@@ -1,3 +1,5 @@
 setlocal foldmethod=marker foldmarker={{{,}}}
 setlocal lisp iskeyword+=?
 setlocal commentstring=;\ %s
+
+setlocal lispwords+=<=