gssapi/mech: mech_locl.h roken.h must be included earlier

If included roken.h should be immediately following config.h.
Doing so ensures that all platform specific headers are
included in the proper order and avoids unnecessary includes
of headers managed by roken.h.

Change-Id: I27f11b42300b6ebcfbcc8d2c53915e96b6eec1d9

lib/gssapi/mech/mech_locl.h

@@ -35,24 +35,17 @@
 
 #include <config.h>
 
+#include <roken.h>
+
 #include <krb5-types.h>
 
-#include <sys/types.h>
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
 #include <ctype.h>
-#include <dlfcn.h>
-#include <errno.h>
 
 #include <heimbase.h>
 
 #include <gssapi_asn1.h>
 #include <der.h>
 
-#include <roken.h>
-
 #include <gssapi.h>
 #include <gssapi_mech.h>
 #include <gssapi_krb5.h>