libretro: Vulkan renderer support

dep/vulkan-loader/include/vulkan_loader.h

@@ -97,5 +97,6 @@ bool LoadVulkanLibrary();
 bool LoadVulkanInstanceFunctions(VkInstance instance);
 bool LoadVulkanDeviceFunctions(VkDevice device);
 void UnloadVulkanLibrary();
+void ResetVulkanLibraryFunctionPointers();
 
 } // namespace Vulkan

dep/vulkan-loader/src/vulkan_loader.cpp

@@ -23,7 +23,8 @@
 #undef VULKAN_MODULE_ENTRY_POINT
 
 namespace Vulkan {
-static void ResetVulkanLibraryFunctionPointers()
+
+void ResetVulkanLibraryFunctionPointers()
 {
 #define VULKAN_MODULE_ENTRY_POINT(name, required) name = nullptr;
 #define VULKAN_INSTANCE_ENTRY_POINT(name, required) name = nullptr;