Fixed sdk/bin/dart2analyzer to use package-root

sdk/bin/dart2analyzer

-#!/bin/bash --posix
-# Copyright (c) 2013, 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.
-
-set -e
-
-BIN_DIR="$(cd "${BASH_SOURCE%/*}" ; pwd -P)"
-SDK_DIR="$(cd "${BIN_DIR}/.." ; pwd -P)"
-DART="$BIN_DIR/dart"
-PKG_ANALYZER="$BIN_DIR/../packages/analyzer_experimental/bin/analyzer.dart"
-
-FOUND_BATCH=0
-FOUND_SDK=0
-for ARG in "$@"
-do
-  case $ARG in
-    -batch|--batch)
-      FOUND_BATCH=1
-      ;;
-    --dart-sdk)
-      FOUND_SDK=1
-      ;;
-    *)
-      ;;
-  esac
-done
-
-if [ $FOUND_SDK = 0 ] ; then
-  exec "$DART" "${PKG_ANALYZER}" --dart-sdk "${SDK_DIR}" "$@"
-else
-  exec "$DART" "${PKG_ANALYZER}" "$@"
-fi