Fixes for kernel private memory size test (#1053)

* Add kernel private memory size to CMake build

* Fix kernel private memory size build error

* Use uint for kernel private memory size test

Not all devices support 64-bit types.

* Register kernel private memory size test

test_conformance/api/CMakeLists.txt

@@ -10,6 +10,7 @@ set(${MODULE_NAME}_SOURCES
          test_queries_compatibility.cpp
          test_create_kernels.cpp
          test_kernels.cpp
+         test_kernel_private_memory_size.cpp
          test_api_min_max.cpp
          test_kernel_arg_changes.cpp
          test_kernel_arg_multi_setup.cpp