Turn off warnings as errors for the debugger

gyp/debugger.gyp

 {
   'variables': {
+    'skia_warnings_as_errors': 0,
     'conditions': [
       [ 'skia_os in ["linux", "freebsd", "openbsd", "solaris", "chromeos"]', {
         # Use the systemwide Qt libs by default
         'variables': {
           'qt_sdk%': '/usr',
         },
         'qt_sdk': '<(qt_sdk)',
         'qt_moc%': 'moc',
         'qt_includes': [
           '<(qt_sdk)/include',
@@ skipping 170 matching lines @@
                           '<(RULE_INPUT_PATH)',
                           '-o', '<(moc_gen_dir)/moc_<(RULE_INPUT_ROOT).cpp' ],
               'message': 'Generating <(RULE_INPUT_ROOT).cpp.',
             },
           ],
         },
       ],
     }],
   ],
 }