SetKernelArg deprecated from WebCL specification.

Examples:
2012-12-27  Sharath Kamath  <kamath.sharath@gmail.com>

        Replace SetKernelArg and related API with setArg.
        Issue #40

        Reviewed by Antonio.

        * WebCL/Deform/SimCL.js:
        (SimulateCL):
        * WebCL/Hello/index.html:
        * WebCL/Nbody/SimCL.js:
        (SimulateCL):

Source/WebCore:

2012-12-27  Sharath Kamath  <kamath.sharath@gmail.com>

        SetKernelArg is deleted and functionality merged into setArg.
        Issue #40

        Reviewed by Antonio.

        As SetKernelArg deprecated from WebCL specification the API is deleted from
        WebCLKernel interface. Functionality merged into setArg API.

        No new tests.

        * Modules/webcl/WebCLKernel.cpp:
        (WebCore::WebCLKernel::setArg):
        (WebCore):
        * Modules/webcl/WebCLKernel.h:
        (WebCLKernel):
        * Modules/webcl/WebCLKernel.idl:
        * bindings/js/JSWebCLKernelCustom.cpp: