Fix build when using Xcode 7 which contains .tbd files instead of .dylib

webrtc/libjingle_examples.gyp

 #
 # Copyright 2012 The WebRTC Project Authors. All rights reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 {
@@ skipping 320 matching lines @@
           'xcode_settings': {
             'CLANG_ENABLE_OBJC_ARC': 'YES',
             'WARNING_CFLAGS': [
               '-Wno-deprecated-declarations',
             ],
           },
           'link_settings': {
             'xcode_settings': {
               'OTHER_LDFLAGS': [
                 '-framework CFNetwork',
+                '-licucore',
               ],
             },
-            'libraries': [
-              '$(SDKROOT)/usr/lib/libicucore.dylib',
-            ],
           }
         },  # target socketrocket
       ],  # targets
     }],  # OS=="ios" or (OS=="mac" and target_arch!="ia32" and mac_sdk>="10.8")
 
     ['OS=="android"', {
       'targets': [
         {
           'target_name': 'AppRTCDemo',
           'type': 'none',
@@ skipping 44 matching lines @@
             'apk_name': 'AppRTCDemoTest',
             'java_in_dir': 'examples/androidtests',
             'is_test_apk': 1,
           },
           'includes': [ '../build/java_apk.gypi' ],
         },
       ],  # targets
     }],  # OS=="android"
   ],
 }