Add support for the Solaris "door" file type with the GNU stat command
(CR #16575088)

This patch will be submitted upstream.

--- coreutils-8.16/lib/file-type.c.orig	2014-02-04 08:45:32.295255617 -0800
+++ coreutils-8.16/lib/file-type.c	2014-02-04 14:31:27.647845083 -0800
@@ -55,6 +55,9 @@
   if (S_ISSOCK (st->st_mode))
     return _("socket");
 
+  if (S_ISDOOR (st->st_mode))
+    return _("door");
+
   if (S_TYPEISMQ (st))
     return _("message queue");