Validation fixes for dEQP-VK.api.*
- Correct minDepthBounds value
- api.info.device.properties: use correct offsets when checking `VkPhysicalDeviceProperties` structure
- api.copy_and_blit: corrected image layout barriers usage
See issue #357
Doesn't include dEQP-VK.api.command_buffers fixes, these will be submitted separately.
See merge request !517