[visium] Provide user-mode version of libraries

[Eric Botcazou]

This adds a user-mode set of multilibs to the visium-elf port.

Applied on the mainline.


2015-11-17  Eric Botcazou  <ebotca...@adacore.com>

        * config/visium/t-visium (MULTILIB_OPTIONS): Add muser-mode.
        (MULTILIB_DIRNAMES): Adjust accordingly.

-- 
Eric Botcazou
Index: config/visium/t-visium
===================================================================
--- config/visium/t-visium	(revision 230453)
+++ config/visium/t-visium	(working copy)
@@ -19,5 +19,5 @@
 
 # The compiler defaults to -mcpu=gr5 but this may be overridden via --with-cpu
 # at configure time so the -mcpu setting must be symmetrical.
-MULTILIB_OPTIONS = mcpu=gr5/mcpu=gr6
-MULTILIB_DIRNAMES = gr5 gr6
+MULTILIB_OPTIONS = mcpu=gr5/mcpu=gr6 muser-mode
+MULTILIB_DIRNAMES = gr5 gr6 user