Added functions to handle WebCLSampler and WebCLEvent

Signed-off-by: Andre Luiz Viana Loureiro <andre.vl@samsung.com>
LayoutTest for WebCLEvent

Signed-off-by: Andre Luiz Viana Loureiro <andre.vl@samsung.com>
Updated webcl-kernel-result layout test to fit the with webcl-test class

Signed-off-by: Andre Luiz Viana Loureiro <andre.vl@samsung.com>