SubmitInfoBuilder: have two slices, but only one count.

[cheako]

wait_semaphore_count is shared by p_wait_semaphores and p_wait_dst_stage_mask, but there are two functions used to set these and they can be passed different counts. This silently leads to crashes that validation layers don't catch.

[aloucks]

I believe the documentation is stating that it's your responsibility to assert those arrays are of the same length.

https://www.khronos.org/registry/vulkan/specs/1.1-extensions/man/html/VkSubmitInfo.html

Valid Usage (Implicit)

If waitSemaphoreCount is not 0, pWaitSemaphores must be a valid pointer to an array of waitSemaphoreCount valid VkSemaphore handles

If waitSemaphoreCount is not 0, pWaitDstStageMask must be a valid pointer to an array of waitSemaphoreCount valid combinations of VkPipelineStageFlagBits values

EDIT: See also: #210

[MarijnS95]

We had a newer report about this in #445, with some more context, so I'll close this as duplicate. It's still something I'd like to clean up in the next breaking release though.