$NetBSD: patch-CMakeLists.txt,v 1.1 2025/03/08 22:57:40 jakllsch Exp $

Use our submodule for volk.

--- CMakeLists.txt.orig	2024-10-02 19:48:47.000000000 +0000
+++ CMakeLists.txt
@@ -56,7 +56,7 @@ endif()
 set_property(GLOBAL PROPERTY USE_FOLDERS ON)
 
 find_package(VulkanHeaders QUIET REQUIRED CONFIG)
-find_package(volk QUIET REQUIRED CONFIG)
+add_subdirectory(volk)
 if ((APPLE OR BUILD_TESTS) AND NOT ANDROID)
     find_package(VulkanLoader QUIET REQUIRED CONFIG)
 endif()