Add UUID and LUID types to InfoType

[kenba]

OpenCL 3 can use the values: CL_DEVICE_UUID_KHR, CL_DRIVER_UUID_KHR and CL_DEVICE_LUID_KHR in calls to clGetDeviceInfo to get UUID and LUID values from OpenCL 3 devices. A UUID is a 16 byte array and a LUID is an 8 byte array.

Currently, UUIDs and LUIDs are both returned as Vec of the equivalent size and can be converted into Uuid an Luid types defined in device.rs. However, it would be more consistent if the Uuid an Luid types were values of the InfoType enum instead of newtypes in device.rs.

It would also be an opportunity to fix the bug in fmt::Display for Uuid!

[kenba]

Incorporated in version 0.6.0.