2013-04-12  Alexandre Rocha  <a.rocha@samsung.com>
Stress test - 4 kernels in the same device

        Executions of 4 diferent kernels many times in the same
        device.

        Reviewed by Afonso Costa.

        * LayoutTests/webcl/resources/kernels.js:
        * LayoutTests/webcl/resources/webcl-test-utils.js:
        * LayoutTests/webcl/tests/webcl-stress-kernels-one-device.html: Added.
        * LayoutTests/webcl/tests/webcl-stress-kernels-one-device-expected.txt: Added