Fix the script analyzer/tool/generate_files

pkg/analyzer/tool/generate_files

 #!/usr/bin/env bash
 # Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 #
 # This script executes code generation tools found in the analyzer
 # "tool" directory.
 
 set -e
 
 function follow_links() {
   file="$1"
   while [ -h "$file" ]; do
     # On Mac OS, readlink -f doesn't work.
     file="$(readlink "$file")"
   done
   echo "$file"
 }
 
 # Unlike $0, $BASH_SOURCE points to the absolute path of this file.
 PROG_NAME="$(follow_links "$BASH_SOURCE")"
 
 SCRIPT_DIR="$(cd "${PROG_NAME%/*}" ; pwd -P)"
 
 ROOT_DIR="$(cd "${SCRIPT_DIR}/../../.." ; pwd -P)"
 
-BIN_DIR="${ROOT_DIR}/sdk/bin"
-
 if [ -z "$DART_CONFIGURATION" ];
 then
-  DART_CONFIGURATION="ReleaseIA32"
+  DART_CONFIGURATION="ReleaseX64"
 fi
 
 if [[ `uname` == 'Darwin' ]];
 then
-  BUILD_DIR="${ROOT_DIR}/xcodebuild/$DART_CONFIGURATION"
+  BIN_DIR="${ROOT_DIR}/xcodebuild/$DART_CONFIGURATION/dart-sdk/bin"

[Kevin Millikin (Google), 2017/08/10 12:06:01]

Note that this requires one to build the target create_sdk where before it only
required, e.g., to build the target runtime.

 else
-  BUILD_DIR="${ROOT_DIR}/out/$DART_CONFIGURATION"
+  BIN_DIR="${ROOT_DIR}/out/$DART_CONFIGURATION/dart-sdk/bin"
 fi
 
-PKG_DIR="${BUILD_DIR}/packages"
-
 DART="${BIN_DIR}/dart"
 
 declare -a VM_OPTIONS
 VM_OPTIONS+=("--checked")
-VM_OPTIONS+=("--package-root=${PKG_DIR}")
+VM_OPTIONS+=("--packages=${ROOT_DIR}/.packages")
 
 cd "${SCRIPT_DIR}"
 "${DART}" "${VM_OPTIONS[@]}" "task_dependency_graph/generate.dart"
 "${DART}" "${VM_OPTIONS[@]}" "summary/generate.dart"