Tests for cl_khr_device_uuid (#813)

Basic conformance testing for the cl_khr_device_uuid extension.  Checks
that the ID queries return the right sizes and that the returned IDs are
stable across two calls to clGetDeviceInfo. If device LUID validity is
true, also checks that one and only one bit is set in the device node
mask.

Signed-off-by: Einar Hov <einar.hov@arm.com>

test_conformance/computeinfo/CMakeLists.txt

@@ -2,6 +2,7 @@ set(MODULE_NAME computeinfo)
 
 set(${MODULE_NAME}_SOURCES
         main.cpp
+        device_uuid.cpp
         extended_versioning.cpp
 )