A timestamp query records the current time when it's issued, not when
the data is being retrieved.

Change-Id: Idb6e7fe6736a5b54bd23ef1613eaf953da86aa08
Reviewed-on: https://swiftshader-review.googlesource.com/5771Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>