vulkan backend implementation 4: multiple vertex streaming

[rinthel]

Hello, this is the 4th PR of my vulkan backend implementation (#274) !

Changes

• Multiple vertex streaming is implemented! In order to support this, pipeline creation process and bindings of vertex buffers are modified.
• Some additional condition handling codes are added for devices that don't have debug_utils extension (it was needed when I run the examples on my android device, which does not have EXT_debug_utils extensions...)
• After enumerating present modes that are supported by hardware, choose the preferred present mode first and set it.
  • currently, the order of present modes is FIFO, FIFO relaxed, Mailbox, and Immediate.
  • I referred the vulkan reference book to pick FIFO at first.
• During render pass creation, attachment's load and store operations are set by LOAD and STORE, instead DONT_CARE. So initial layouts of image are changed to ATTACHMENT_OPTIMAL instead of UNDEFINED.
• Fix resolve attachment reference setup during render pass creation. I think that it was the main reason that crashes example 19 and some others.

Status

• Now almost examples are executable, except to those which use compute shaders.

Thank you for reading. Please let me know if you have any question!

[bkaradzic]

Works with AMD on Linux now. 👍