GPU: Partial implementation of long GPU queries.

Long queries write a 128-bit result value to memory, which consists of a 64 bit query value and a 64 bit timestamp.

In this implementation, only select=Zero of the Crop unit is implemented, this writes the query sequence as a 64 bit value, and a 0u64 value for the timestamp, since we emulate an infinitely fast GPU.

This specific type was hwtested, but more rigorous tests should be performed in the future for the other types.