cl21: Convert select to testHarness (#72)
cl21: Convert select to testHarness (#72)

Signed-off-by: Radek Szymanski <a46b38089acf8d5419512b5627d21e7e565f2048@arm.com>
KhronosGroup/OpenCL-CTS,KhronosGroup/OpenCL-CTS,KhronosGroup/OpenCL-CTS,KhronosGroup/OpenCL-CTS