LICENSE: update Closure Linter to Apache 2.0

LICENSE

@@ -299,37 +299,22 @@ maintained libraries. The externally maintained libraries used by Node are:
     IN THE SOFTWARE.
   """
 
-- Closure Linter is located at tools/closure_linter. Closure's license
+- Closure Linter is located at tools/closure_linter. Closure Linter's license
   follows:
   """
-    # Copyright (c) 2007, Google Inc.
-    # All rights reserved.
+    # Copyright 2010 The Closure Linter Authors. All Rights Reserved.
     #
-    # Redistribution and use in source and binary forms, with or without
-    # modification, are permitted provided that the following conditions are
-    # met:
+    # Licensed under the Apache License, Version 2.0 (the "License");
+    # you may not use this file except in compliance with the License.
+    # You may obtain a copy of the License at
     #
-    #     * Redistributions of source code must retain the above copyright
-    # notice, this list of conditions and the following disclaimer.
-    #     * Redistributions in binary form must reproduce the above
-    # copyright notice, this list of conditions and the following disclaimer
-    # in the documentation and/or other materials provided with the
-    # distribution.
-    #     * Neither the name of Google Inc. nor the names of its
-    # contributors may be used to endorse or promote products derived from
-    # this software without specific prior written permission.
+    #      http://www.apache.org/licenses/LICENSE-2.0
     #
-    # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-    # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-    # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-    # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-    # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-    # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-    # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-    # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-    # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-    # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-    # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+    # Unless required by applicable law or agreed to in writing, software
+    # distributed under the License is distributed on an "AS-IS" BASIS,
+    # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    # See the License for the specific language governing permissions and
+    # limitations under the License.
   """
 
 - tools/cpplint.py is a C++ linter. Its license follows: