Correct iOS device build for latest Xcode beta.

net/net_common.gypi

 # Copyright 2015 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.
 
 {
   # This target is included in both 'net' and 'net_small'.
   'type': '<(component)',
   'variables': { 'enable_wexit_time_destructors': 1, },
   'dependencies': [
     '../base/base.gyp:base',
@@ skipping 336 matching lines @@
     [ 'OS == "ios"', {
         'sources!': [
           'disk_cache/blockfile/file_posix.cc',
         ],
         'link_settings': {
           'libraries': [
             '$(SDKROOT)/System/Library/Frameworks/CFNetwork.framework',
             '$(SDKROOT)/System/Library/Frameworks/MobileCoreServices.framework',
             '$(SDKROOT)/System/Library/Frameworks/Security.framework',
             '$(SDKROOT)/System/Library/Frameworks/SystemConfiguration.framework',
-            '$(SDKROOT)/usr/lib/libresolv.dylib',
           ],
+          'xcode_settings': {
+            'OTHER_LDFLAGS': [
+              '-lresolv',
+            ],
+          },
         },
       },
     ],
     [ 'OS == "ios" or OS == "mac"', {
         'sources': [
           '<@(net_base_mac_ios_sources)',
         ],
       },
     ],
     ['OS=="android" and _toolset=="target"', {
@@ skipping 46 matching lines @@
         ['include', '^cert/test_root_certs_nss\\.cc$'],
         ['include', '^cert/x509_util_nss_certs\\.cc$'],
         ['include', '^cert_net/nss_ocsp\\.cc$'],
         ['include', '^cert_net/nss_ocsp\\.h$'],
         ['include', '^proxy/proxy_resolver_mac\\.cc$'],
         ['include', '^proxy/proxy_server_mac\\.cc$'],
       ],
     }],
   ],
 }