[GPU] Improve readability of initialization errors and remove references to OpenGL.

src/xenia/ui/vulkan/vulkan_provider.cc

@@ -30,9 +30,12 @@ std::unique_ptr<VulkanProvider> VulkanProvider::Create(Window* main_window) {
   if (!provider->Initialize()) {
     xe::FatalError(
         "Unable to initialize Vulkan graphics subsystem.\n"
+        "\n"
         "Ensure you have the latest drivers for your GPU and that it "
-        "supports Vulkan. See http://xenia.jp/faq/ for more information and a "
-        "list of supported GPUs.");
+        "supports Vulkan.\n"
+        "\n"
+        "See http://xenia.jp/faq/ for more information and a list of supported "
+        "GPUs.");
     return nullptr;
   }
   return provider;