Update libjpeg-turbo to 1.2.

libjpeg.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': {
     'shared_generated_dir': '<(SHARED_INTERMEDIATE_DIR)/third_party/libjpeg_turbo',
     'conditions': [
       [ 'chromeos == 1 or (os_posix == 1 and \
         OS != "mac" and OS != "linux" and OS != "android")', {
@@ skipping 17 matching lines @@
         {
           'target_name': 'libjpeg',
           'type': '<(library)',
           'include_dirs': [
             '.',
           ],
           'defines': [
             'WITH_SIMD', 'MOTION_JPEG_SUPPORTED',
           ],
           'sources': [
-            'jaricom.c',
             'jcapimin.c',
             'jcapistd.c',
-            'jcarith.c',
             'jccoefct.c',
             'jccolor.c',
             'jcdctmgr.c',
             'jchuff.c',
             'jchuff.h',
             'jcinit.c',
             'jcmainct.c',
             'jcmarker.c',
             'jcmaster.c',
             'jcomapi.c',
             'jconfig.h',
             'jcparam.c',
             'jcphuff.c',
             'jcprepct.c',
             'jcsample.c',
             'jdapimin.c',
             'jdapistd.c',
-            'jdarith.c',
             'jdatadst.c',
             'jdatasrc.c',
             'jdcoefct.c',
             'jdcolor.c',
             'jdct.h',
             'jddctmgr.c',
             'jdhuff.c',
             'jdhuff.h',
             'jdinput.c',
             'jdmainct.c',
@@ skipping 220 matching lines @@
       ],
     }],
   ],
 }
 
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 # tab-width:2
 # indent-tabs-mode:nil
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 # vim: set expandtab tabstop=2 shiftwidth=2: