Add ARM toolchain support.

build_tools/bots/bot_common.sh

 #!/bin/bash
 # Copyright (c) 2011 The Native Client Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 #
 
 # The nacl-install-{linux,mac,windows}-*.sh scripts should source this script.
 #
 
 set -o nounset
 set -o errexit
 
 RESULT=0
 MESSAGES=
 
 BuildSuccess() {
-  echo "naclports nacl-install-all: Install SUCCEEDED $1 \
-($NACL_PACKAGES_BITSIZE)"
+  echo "naclports nacl-install-all: Install SUCCEEDED $1 ($NACL_ARCH)"
 }
 
 BuildFailure() {
-  MESSAGE="naclports nacl-install-all: Install FAILED for $1 \
-($NACL_PACKAGES_BITSIZE)"
+  MESSAGE="naclports nacl-install-all: Install FAILED for $1 ($NACL_ARCH)"
   echo $MESSAGE
   echo "@@@STEP_FAILURE@@@"
   MESSAGES="$MESSAGES\n$MESSAGE"
   RESULT=1
 }
 
 BuildPackage() {
   if make $1 ; then
     BuildSuccess $1
   else
     if [ ${BUILDBOT_BUILDERNAME:0:3} = win ] ; then
       echo "@@@STEP_WARNINGS@@@"
       for i in 1 2 3 ; do
         if make $1 ; then
           BuildSuccess $1
           return
         fi
       done
     fi
     BuildFailure $1
   fi
 }