Synchronize with devel/libggml. This patch isn't really needed,
because the backend isn't loaded dynamically.

Index: ggml/src/ggml-backend-reg.cpp
--- ggml/src/ggml-backend-reg.cpp.orig
+++ ggml/src/ggml-backend-reg.cpp
@@ -531,7 +531,9 @@ static ggml_backend_reg_t ggml_backend_load_best(const
         search_paths.push_back(fs::u8path(GGML_BACKEND_DIR));
 #endif
         // default search paths: executable directory, current directory
+#ifndef __OpenBSD__
         search_paths.push_back(get_executable_path());
+#endif
         search_paths.push_back(fs::current_path());
     } else {
         search_paths.push_back(fs::u8path(user_search_path));
