Pulls libjpeg-turbo and yasm to the Chromium tree.

This change pulls the source code of libjpeg-turbo and the Windows binary of yasm. (We need to change '~/.gyp/include.gypi' and set 'use_libjpeg_turbo' to 1 to use libjpeg-turbo, though.)

TBR=brettw,mark
BUG=48789
TEST=none
Review URL: http://codereview.chromium.org/5723004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@68992 0039d316-1c4b-4281-b951-d872f2087c98