Correct iOS device build for latest Xcode beta.

third_party/libxml/libxml.gyp

 # Copyright (c) 2012 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': {
     'conditions': [
       # Define an "os_include" variable that points at the OS-specific generated
       # headers.  These were generated by running the configure script offline.
       ['os_posix == 1 and OS != "mac" and OS != "ios"', {
@@ skipping 50 matching lines @@
               ],
               'all_dependent_settings': {
                 'defines': [
                   'USE_SYSTEM_LIBXML',
                 ],
                 'include_dirs': [
                   '$(SDKROOT)/usr/include/libxml2',
                 ],
               },
               'link_settings': {
-                'libraries': [
-                  '$(SDKROOT)/usr/lib/libxml2.dylib',
-                ],
+                'xcode_settings': {
+                  'OTHER_LDFLAGS': [
+                    '-lxml2',
+                  ]
+                },
               },
             }],
           ],
         }, {  # else: !use_system_libxml
           'type': 'static_library',
           'sources': [
             'chromium/libxml_utils.h',
             'chromium/libxml_utils.cc',
             'linux/config.h',
             'linux/include/libxml/xmlversion.h',
@@ skipping 170 matching lines @@
             }],
           ],
         }],
         ['OS == "ios"', {
           'toolsets': ['host', 'target'],
         }],
       ],
     },
   ],
 }