[patch] [alpha] add multiarch definitions for alpha-linux-gnu

[Matthias Klose]

The following patch adds the multiarch definitions for alpha-linux-gnu. Tested
using a Debian/Ubuntu package build. Ok for the trunk?

  Matthias


2012-11-14  Matthias Klose  <d...@ubuntu.com>

	* config/alpha/t-linux: New file; define MULTIARCH_DIRNAME.
	* config.gcc <alpha*-*-linux*> (tmake_file): Include alpha/t-linux.

Index: config/alpha/t-linux
===================================================================
--- config/alpha/t-linux	(revision 0)
+++ config/alpha/t-linux	(revision 0)
@@ -0,0 +1 @@
+MULTIARCH_DIRNAME = $(call if_multiarch,alpha-linux-gnu)
Index: config.gcc
===================================================================
--- config.gcc	(revision 193508)
+++ config.gcc	(working copy)
@@ -831,6 +831,7 @@
 	;;
 alpha*-*-linux*)
 	tm_file="elfos.h ${tm_file} alpha/elf.h alpha/linux.h alpha/linux-elf.h glibc-stdint.h"
+	tmake_file="${tmake_file} alpha/t-linux"
 	extra_options="${extra_options} alpha/elf.opt"
 	;;
 alpha*-*-freebsd*)