vulkan: Update headers to 1.1.80

Key changes since 1.1.76:
* Added VK_KHR_create_renderpass2
* Added VK_KHR_8bit_storage
* Added VK_EXT_conditional_rendering
* Added VkVendorId enum

Test: build
Change-Id: I8ad7d26189d7997c76269533c0f195d8ada07f6a
2 files changed