adb_gdb: Successfully find toolchain for --target-arch=x86_64.

build/android/adb_gdb

 #!/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.
 #
 
 # A generic script used to attach to a running Chromium process and
 # debug it. Most users should not use this directly, but one of the
 # wrapper scripts like adb_gdb_content_shell
@@ skipping 554 matching lines @@
     *)
       echo "$ARCH-linux-android"
       ;;
   esac
 }
 
 # Convert an NDK architecture name into a toolchain name prefix
 # $1: NDK architecture name (e.g. 'arm')
 # Out: NDK toolchain name prefix (e.g. 'arm-linux-androideabi')
 get_arch_toolchain_prefix () {
-  # Return the configure triplet, except for x86!
-  if [ "$1" = "x86" ]; then
+  # Return the configure triplet, except for x86 and x86_64!
+  if [ "$1" = "x86" -o "$1" = "x86_64" ]; then
     echo "$1"
   else
     get_arch_gnu_config $1
   fi
 }
 
 # Find a NDK toolchain prebuilt file or sub-directory.
 # This will probe the various arch-specific toolchain directories
 # in the NDK for the needed file.
 # $1: NDK install path
@@ skipping 455 matching lines @@
 
 if [ "$VERBOSE" -gt 0 ]; then
   echo "### START $COMMANDS"
   cat $COMMANDS
   echo "### END $COMMANDS"
 fi
 
 log "Launching gdb client: $GDB $GDB_ARGS -x $COMMANDS"
 $GDB $GDB_ARGS -x $COMMANDS &&
 rm -f "$GDBSERVER_PIDFILE"