2013-02-19  Sharath Kamath  <kamath.sharath@gmail.com>

        Part 2 - ComputeContextCL::computeMemoryTypeToCL doesnt handle HOST_PTR flags.
        Issue #104

        Reviewed by Antonio.

        API createBuffer and createImage2D must use CL_MEM_COPY_HOST_PTR flag along
        with the MEM_FLAGS passed.
        This must be bitwise OR ed with the other flag when a object is passed to be
        copied into the buffer.

        No new tests.

        * platform/opencl/ComputeContextCL.cpp:
        (WebCore::ComputeContext::createBuffer):
        (WebCore::ComputeContext::createImage2D):