Add barriers to read query data after copy

Add barriers to read query data after copy

When the query pool results that were copied out to a buffer, a barrier
should be placed to ensure the data is written before the host read it,
specially if the memory allocated is non-host-coherent. The invalidation
of the mapped memory is not enough in that case.

Affected tests:

  dEQP-VK.query_pool.occlusion_query.copy*
  dEQP-VK.pipeline.timestamp.transfer_tests.*copy_query_pool_results*
  dEQP-VK.pipeline.timestamp.misc_tests.two_cmd_buffers_primary*

Components: Vulkan
VK-GL-CTS issue: 1756

Change-Id: I115c9e62f1b369e0f1ad9a30f9a6982c876beb74