Fixed typo in ffmpeg.gyp that caused avcodec-52.dll to not get copied.

third_party/ffmpeg/ffmpeg.gyp

 # Copyright (c) 2009 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.
 
 {
   'includes': [
     '../../build/common.gypi',
   ],
   'target_defaults': {
     'conditions': [
@@ skipping 159 matching lines @@
       ],
     },
     {
       'target_name': 'ffmpeg_binaries',
       'type': 'none',
       'msvs_guid': '4E4070E1-EFD9-4EF1-8634-3960956F6F10',
       'conditions': [
         ['OS=="win"', {
           'variables': {
             'source_files': [
-              'binaries/avcodeec-52.dll',
+              'binaries/avcodec-52.dll',
               'binaries/avformat-52.dll',
               'binaries/avutil-50.dll',
               'binaries/pthreadGC2.dll',
             ],
             'output_files': [
               '<(PRODUCT_DIR)/avcodec-52.dll',
               '<(PRODUCT_DIR)/avformat-52.dll',
               '<(PRODUCT_DIR)/avutil-50.dll',
               '<(PRODUCT_DIR)/pthreadGC2.dll',
             ],
@@ skipping 42 matching lines @@
             './copy_binaries.sh',
             '<@(source_files)',
             '<(PRODUCT_DIR)/'
           ],
           'message': 'Copying FFmpeg binaries...',
         },
       ],
     },
   ],
 }