message: Add cmd_push_constants to Device.
diff: @@ -649,6 +649,24 @@ pub trait DeviceV1_0 {
  )
  }
  + unsafe fn cmd_push_constants(
  + &self,
  + command_buffer: vk::CommandBuffer,
  + layout: vk::PipelineLayout,
  + stage_flags: vk::ShaderStageFlags,
  + offset: vk::uint32_t,
  + constants: &[u32]
  + ) {
  + self.fp_v1_0().cmd_push_constants(
  + command_buffer,
  + layout,
  + stage_flags,
  + offset,
  + constants.len() as vk::uint32_t,
  + constants.as_ptr() as _,
  + );
  + }
  +
  unsafe fn cmd_begin_render_pass(
  &self,
  command_buffer: vk::CommandBuffer,
  