Disable getenv() in libjpeg and libjpeg_turbo (roll to 238232)

third_party/libjpeg/libjpeg.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.
 
 {
   # This file handles building both with our local libjpeg and with the system
   # libjpeg.
   'conditions': [
     ['use_system_libjpeg==0', {
       'targets': [
         {
           'target_name': 'libjpeg',
           'type': 'static_library',
+          'defines': [
+            'NO_GETENV',  # getenv() is not thread-safe.
+          ],
           'sources': [
             'jcapimin.c',
             'jcapistd.c',
             'jccoefct.c',
             'jccolor.c',
             'jcdctmgr.c',
             'jchuff.c',
             'jchuff.h',
             'jcinit.c',
             'jcmainct.c',
@@ skipping 78 matching lines @@
           'link_settings': {
             'libraries': [
               '-ljpeg',
             ],
           },
         }
       ],
     }],
   ],
 }