Switching Skia to chromium's libjpeg-turbo

Compile SkJpegCodec and SkImageDecoder_libjpeg with
chromium's libjpeg-turbo.  SkImageDecoder_libjpeg still uses
libjpeg on Android and the Android framework.  SkJpegCodec is
still not compiled on the Android framework.

BUG=skia:

Review URL: https://codereview.chromium.org/1275773004
7 files changed