Fix depth buffer reuse sync

[krOoze]

fix #308

Depth Attachment VK_ATTACHMENT_STORE_OP_DONT_CARE happens in VK_PIPELINE_STAGE_LATE_FRAGMENT_TESTS_BIT+VK_ACCESS_DEPTH_STENCIL_ATTACHMENT_WRITE_BIT. Alter code to that effect with the assumption this was the intended previous resource access to synchronize against.

[Overv]

Thanks for the fix