exclude the linux files that are not needed on openbsd

media/media.gyp

 # Copyright (c) 2011 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': {
     'chromium_code': 1,
     # Override to dynamically link the PulseAudio library.
     'use_pulseaudio%': 0,
   },
@@ skipping 301 matching lines @@
                   'sources!': [
                     'audio/linux/pulse_output.cc',
                     'audio/linux/pulse_output.h',
                   ],
                 }],
               ],
             }],
           ],
         }],
         ['OS=="openbsd"', {
-          'sources/': [ ['exclude', 'alsa_' ],
-                        ['exclude', 'audio_manager_linux' ],
-                        ['exclude', '\\.mm?$' ] ],
+          'sources/': [ ['exclude', '/alsa_' ],
+                        ['exclude', '/audio_manager_linux' ],
+                        ['exclude', '/pulse_' ] ],
           'link_settings': {
             'libraries': [
             ],
           },
         }],
         ['OS!="openbsd"', {
           'sources!': [
             'audio/openbsd/audio_manager_openbsd.cc',
             'audio/openbsd/audio_manager_openbsd.h',
           ],
@@ skipping 548 matching lines @@
             '../third_party/ffmpeg/ffmpeg.gyp:ffmpeg',
           ],
           'sources': [
             'tools/media_bench/media_bench.cc',
           ],
         },
       ],
     }]
   ],
 }