$OpenBSD$

fix include path

Index: src/tests/glad.cpp
--- src/tests/glad.cpp.orig
+++ src/tests/glad.cpp
@@ -2,7 +2,7 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
-#include <catch.hpp>
+#include <catch/catch.hpp>
 #include <glad/glad.h>
 
 // This is not an actual test, but a work-around for issue #2183.