Add ARM toolchain support.

libraries/x264-snapshot-20091023-2245/nacl-x264-snapshot-20091023-2245.sh

 #!/bin/bash
 # Copyright (c) 2012 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.
 
 # nacl-x264-snapshot-20091023-2245.sh
 #
 # usage:  nacl-x264-snapshot-20091023-2245.sh
 #
 # this script downloads, patches, and builds x264 for Native Client
@@ skipping 13 matching lines @@
   export CC=${NACLCC}
   export CXX=${NACLCXX}
   export AR=${NACLAR}
   export RANLIB=${NACLRANLIB}
   export PKG_CONFIG_PATH=${NACL_SDK_USR_LIB}/pkgconfig
   export PKG_CONFIG_LIBDIR=${NACL_SDK_USR_LIB}
   export PATH=${NACL_BIN_PATH}:${PATH};
   ChangeDir ${NACL_PACKAGES_REPOSITORY}/${PACKAGE_NAME}
 
   local naclhost
-  if [ "${NACL_PACKAGES_BITSIZE}" == pnacl ]; then
+  if [ "${NACL_ARCH}" = pnacl ]; then
     naclhost=pnacl
   else
     naclhost=x86-nacl-linux
   fi
 
   echo "  ./configure \
     --cross-prefix=${NACL_CROSS_PREFIX} \
     --disable-asm \
     --disable-pthread \
     --prefix=${NACL_SDK_USR} \
@@ skipping 21 matching lines @@
   DefaultPatchStep
   CustomConfigureStep
   DefaultBuildStep
   DefaultInstallStep
   DefaultCleanUpStep
 }
 
 
 CustomPackageInstall
 exit 0