Update libjpeg_turbo to HEAD

TBR=inferno
BUG=299835

Review URL: https://codereview.chromium.org/26954005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@228439 0039d316-1c4b-4281-b951-d872f2087c98
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@228440 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 228439
SVN changes up to revision 228440