vulkan: Update Vulkan headers to 1.0.54

Key changes since 1.0.53:
* Updated several KHX extensions and promoted to KHR:
  * VK_KHR_external_memory_capabilities
  * VK_KHR_external_memory_win32
  * VK_KHR_external_memory_fd
  * VK_KHR_external_semaphore_capabilities
  * VK_KHR_external_semaphore
  * VK_KHR_external_semaphore_win32
  * VK_KHR_external_semaphore_fd
  * VK_KHR_win32_keyed_mutex
* Added new extensions:
  * VK_KHR_external_fence_capabilities
  * VK_KHR_external_fence
  * VK_KHR_external_fence_win32
  * VK_KHR_external_fence_fd
  * VK_KHR_storage_buffer_storage_class
  * VK_KHR_variable_pointers
  * VK_KHR_dedicated_allocation
  * VK_KHR_get_memory_requirements2

Test: build
Change-Id: I790143b0d5160c02a016f1e67720edbf6bc45636
diff --git a/vulkan/libvulkan/api_gen.cpp b/vulkan/libvulkan/api_gen.cpp
index 54c77f1..001eaf1 100644
--- a/vulkan/libvulkan/api_gen.cpp
+++ b/vulkan/libvulkan/api_gen.cpp
@@ -454,9 +454,10 @@
         "vkEnumeratePhysicalDeviceGroupsKHX",
         "vkEnumeratePhysicalDevices",
         "vkGetInstanceProcAddr",
-        "vkGetPhysicalDeviceExternalBufferPropertiesKHX",
+        "vkGetPhysicalDeviceExternalBufferPropertiesKHR",
+        "vkGetPhysicalDeviceExternalFencePropertiesKHR",
         "vkGetPhysicalDeviceExternalImageFormatPropertiesNV",
-        "vkGetPhysicalDeviceExternalSemaphorePropertiesKHX",
+        "vkGetPhysicalDeviceExternalSemaphorePropertiesKHR",
         "vkGetPhysicalDeviceFeatures",
         "vkGetPhysicalDeviceFeatures2KHR",
         "vkGetPhysicalDeviceFormatProperties",