Add build files for libjpeg-turbo.
This change adds a GYP file, header files, and a README file used for building libjpeg-turbo. (This GYP file builds libjpeg-turbo only on Windows and Mac since Linux uses the system libjpeg.)

BUG=48789
TEST=build libjpeg-turbo on Windows and Mac.
Review URL: http://codereview.chromium.org/4298001

git-svn-id: http://src.chromium.org/svn/trunk/deps/third_party/libjpeg_turbo@66929 4ff67af0-8c30-449e-8e8b-ad334ec8d88c
9 files changed