Remove <(library) usage from ots.gyp.

ots.gyp

 # Copyright (c) 2009 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'includes': [
     'ots-common.gypi',
   ],
   'targets': [
     {
       'target_name': 'ots',
-      'type': '<(library)',
+      'type': 'static_library',
       'sources': [
         '<@(ots_sources)',
       ],
       'include_dirs': [
         '<@(ots_include_dirs)',
       ],
       'direct_dependent_settings': {
         'include_dirs': [
           '<@(ots_include_dirs)',
         ],
       },
       'dependencies': [
         '../zlib/zlib.gyp:zlib',
       ],
     },
   ],
 }