Merge #221

221: Support VK_KHR_portability_subset r=kvark a=kvark

Our extension IDs were messed up. Good thing to clean them up now, since otherwise nobody would be able to make this work 😅 
Also, the test native example is now fully trying to initialize the portability extension and gather the relevant info. Output on my machine:
```
	vkEnumerateInstanceExtensionProperties: res=0 count=5
	vkEnumeratePhysicalDevices: res=0 count=1
	vkEnumerateDeviceExtensionProperties: res=0 count=3
	gfxGetPhysicalDeviceProperties2KHR
		minVertexInputBindingStrideAlignment = 4
	gfxGetPhysicalDeviceFeatures2KHR
		events = 1
		pointPolygons = 0
		separateStencilMaskRef = 1
		triangleFans = 0
```

Co-authored-by: Dzmitry Malyshau <kvarkus@gmail.com>

.monocodus

@@ -0,0 +1,7 @@
+rust:
+  formatter:
+    - name: rustfmt
+  repo_checkers:
+    - name: rust-clippy
+
+c:

headers/vulkan/vk_platform.h

@@ -2,19 +2,9 @@
 // File: vk_platform.h
 //
 /*
-** Copyright (c) 2014-2017 The Khronos Group Inc.
+** Copyright (c) 2014-2020 The Khronos Group Inc.
 **
-** Licensed under the Apache License, Version 2.0 (the "License");
-** you may not use this file except in compliance with the License.
-** You may obtain a copy of the License at
-**
-**     http://www.apache.org/licenses/LICENSE-2.0
-**
-** Unless required by applicable law or agreed to in writing, software
-** distributed under the License is distributed on an "AS IS" BASIS,
-** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-** See the License for the specific language governing permissions and
-** limitations under the License.
+** SPDX-License-Identifier: Apache-2.0
 */
 
 

headers/vulkan/vulkan.h

@@ -2,19 +2,9 @@
 #define VULKAN_H_ 1
 
 /*
-** Copyright (c) 2015-2019 The Khronos Group Inc.
+** Copyright (c) 2015-2020 The Khronos Group Inc.
 **
-** Licensed under the Apache License, Version 2.0 (the "License");
-** you may not use this file except in compliance with the License.
-** You may obtain a copy of the License at
-**
-**     http://www.apache.org/licenses/LICENSE-2.0
-**
-** Unless required by applicable law or agreed to in writing, software
-** distributed under the License is distributed on an "AS IS" BASIS,
-** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-** See the License for the specific language governing permissions and
-** limitations under the License.
+** SPDX-License-Identifier: Apache-2.0
 */
 
 #include "vk_platform.h"
@@ -38,6 +28,9 @@
 #include "vulkan_macos.h"
 #endif
 
+#ifdef VK_USE_PLATFORM_METAL_EXT
+#include "vulkan_metal.h"
+#endif
 
 #ifdef VK_USE_PLATFORM_VI_NN
 #include "vulkan_vi.h"
@@ -68,10 +61,27 @@
 #endif
 
 
+#ifdef VK_USE_PLATFORM_DIRECTFB_EXT
+#include <directfb.h>
+#include "vulkan_directfb.h"
+#endif
+
+
 #ifdef VK_USE_PLATFORM_XLIB_XRANDR_EXT
 #include <X11/Xlib.h>
 #include <X11/extensions/Xrandr.h>
 #include "vulkan_xlib_xrandr.h"
 #endif
 
+
+#ifdef VK_USE_PLATFORM_GGP
+#include <ggp_c/vulkan_types.h>
+#include "vulkan_ggp.h"
+#endif
+
+
+#ifdef VK_ENABLE_BETA_EXTENSIONS
+#include "vulkan_beta.h"
+#endif
+
 #endif // VULKAN_H_