Update build_ios_libs.sh script to build new Objective-C API

talk/build/objc_app.gypi

 #
 # libjingle
 # Copyright 2014 Google Inc.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are met:
 #
 #  1. Redistributions of source code must retain the above copyright notice,
 #     this list of conditions and the following disclaimer.
 #  2. Redistributions in binary form must reproduce the above copyright notice,
@@ skipping 14 matching lines @@
 # ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #
 
 # Include this .gypi in an ObjC target's definition to allow it to be
 # used as an iOS or OS/X application.
 
 {
   'variables': {
     'infoplist_file': './objc_app.plist',
   },
+  'dependencies': [
+    '<(webrtc_root)/system_wrappers/system_wrappers.gyp:field_trial_default',
+  ],
   'mac_bundle': 1,
   'mac_bundle_resources': [
     '<(infoplist_file)',
   ],
   # The plist is listed above so that it appears in XCode's file list,
   # but we don't actually want to bundle it.
   'mac_bundle_resources!': [
     '<(infoplist_file)',
   ],
   'xcode_settings': {
     'CLANG_ENABLE_OBJC_ARC': 'YES',
     'INFOPLIST_FILE': '<(infoplist_file)',
   },
 }