Compile subscriptions.xml into the libadblockplus build and make itusable

libadblockplus.gyp

 {
   'variables': {
     'have_curl': '<!(python check_curl.py)'
   },
   'includes': ['third_party/v8/build/common.gypi',
                'shell/shell.gyp'],
   'targets': [{
     'target_name': 'libadblockplus',
     'type': '<(library)',
     'include_dirs': [
@@ skipping 55 matching lines @@
           'lib/utils.js',
           'lib/elemHideHitRegistration.js',
           'adblockplus/lib/filterNotifier.js',
           'adblockplus/lib/filterClasses.js',
           'adblockplus/lib/subscriptionClasses.js',
           'adblockplus/lib/filterStorage.js',
           'adblockplus/lib/elemHide.js',
           'adblockplus/lib/matcher.js',
           'adblockplus/lib/filterListener.js',
           'adblockplus/lib/synchronizer.js',
+          'adblockplus/chrome/content/ui/subscriptions.xml',
         ],
         'load_before_files': [
           'lib/compat.js'
         ],
         'load_after_files': [
           'lib/api.js'
         ],
       },
       'inputs': [
         'convert_js.py',
@@ skipping 28 matching lines @@
       'test/FileSystemJsObject.cpp',
       'test/FilterEngineStubs.cpp',
       'test/GlobalJsObject.cpp',
       'test/JsEngine.cpp',
       'test/JsValue.cpp',
       'test/Thread.cpp',
       'test/WebRequest.cpp'
     ]
   }]
 }