2013-08-23  Diego Pinheiro  <diego.qp@samsung.com>

        Change Image Layout Test Data Structure
        Issue #120

        Reviewed by Afonso Costa.

        Change the data from Int32Array to Uint8Array
        makes Image Layout Test more readable, because
        the channel order used is RGBA and each channel
        is defined to be 8 bits long. Then, in the
        kernel execution all, the four coordinates of
        the vector can be used and not only the first one.

        Minor changes, as the test name, were made too.

        * webcl/resources/kernels.js:
        * webcl/tests/webcl-test-image-expected.txt:
        * webcl/tests/webcl-test-image.html: