Use NDK r8b and 64-bit toolchain

build/android/envsetup.sh

 #!/bin/bash
 
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Sets up environment for building Chromium on Android.  It can either be
 # compiled with the Android tree or using the Android SDK/NDK. To build with
 # NDK/SDK: ". build/android/envsetup.sh --sdk".  Environment variable
 # ANDROID_SDK_BUILD=1 will then be defined and used in the rest of the setup to
@@ skipping 11 matching lines @@
 done
 
 if [[ "${ANDROID_SDK_BUILD}" -eq 1 ]]; then
   echo "Using SDK build"
 fi
 
 host_os=$(uname -s | sed -e 's/Linux/linux/;s/Darwin/mac/')
 
 case "${host_os}" in
   "linux")
-    toolchain_dir="linux-x86"
+    toolchain_dir="linux-x86_64"
     ;;
   "mac")
     toolchain_dir="darwin-x86"
     ;;
   *)
     echo "Host platform ${host_os} is not supported" >& 2
     return 1
 esac
 
 CURRENT_DIR="$(readlink -f "$(dirname $BASH_SOURCE)/../../")"
@@ skipping 58 matching lines @@
 export AR_target=$(basename ${ANDROID_TOOLCHAIN}/*-ar)
 
 # Performs a gyp_chromium run to convert gyp->Makefile for android code.
 android_gyp() {
   echo "GYP_GENERATORS set to '$GYP_GENERATORS'"
   "${CHROME_SRC}/build/gyp_chromium" --depth="${CHROME_SRC}" --check "$@"
 }
 
 # FLOCK needs to be null on system that has no flock
 which flock > /dev/null || export FLOCK=