OpenCL implementation of FEImage SVG Filter.

OpenCL implementation of FEImage SVG Filter.
https://bugs.webkit.org/show_bug.cgi?id=110752

Patch by Tamas Czene <tczene@inf.u-szeged.hu> on 2013-02-28
Reviewed by Zoltan Herczeg.

The result of the image is uploaded to an OpenCL buffer.

* Target.pri:
* platform/graphics/gpu/opencl/OpenCLFEImage.cpp: Added.
(WebCore):
(WebCore::FEImage::platformApplyOpenCL):
* svg/graphics/filters/SVGFEImage.h:
(FEImage):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@144289 268f45cc-cd09-0410-ab3c-d52691b4dbfc