Issue 768 - Switch from TR1 to C++11

libadblockplus.gyp

 {
   'conditions': [[
     # We don't want to use curl on Windows and Android, skip the check there
     'OS=="win" or OS=="android"',
     {
       'variables': {
         'have_curl': 0
       }
     },
     {
@@ skipping 147 matching lines @@
       'test/Thread.cpp',
       'test/UpdateCheck.cpp',
       'test/WebRequest.cpp'
     ],
     'msvs_settings': {
       'VCLinkerTool': {
         'SubSystem': '1',   # Console
         'EntryPointSymbol': 'mainCRTStartup',
       },
     },
-    'xcode_settings': {
-      'OTHER_LDFLAGS': ['-stdlib=libstdc++'],
-    },
   }]
 }