Move build scripts to webrtc/build/ios

webrtc/build/ios/objc_app.gypi

+# Copyright (c) 2014 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.
+
+# 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)',
+  },
+}