Add pipeline barriers flushing buffer data to host

Add pipeline barriers flushing buffer data to host

This commit adds a few buffer pipeline barriers whose purpose is to flush
gpu caches, making the buffer data visible to the host.

Affects:
dEQP-VK.pipeline.push_constant.compute_pipeline.simple_test
dEQP-VK.glsl.builtin.precision.*
dEQP-VK.glsl.builtin.function.*
dEQP-VK.api.command_buffers.record_simul_use_secondary_one_primary
dEQP-VK.synchronization.op.single_queue.*
dEQP-VK.query_pool.occlusion_query.*

Components: Vulkan

VK-GL-CTS issue: 1898

Change-Id: Ic6a467b4d1db6cebebf34c8d386e519016fc3fe9