vendor raymenu dependencies

raymenu/vendor/github.com/ebitengine/purego/dlerror.go

@@ -0,0 +1,17 @@
+// SPDX-License-Identifier: Apache-2.0
+// SPDX-FileCopyrightText: 2023 The Ebitengine Authors
+
+//go:build darwin || freebsd || linux || netbsd
+
+package purego
+
+// Dlerror represents an error value returned from Dlopen, Dlsym, or Dlclose.
+//
+// This type is not available on Windows as there is no counterpart to it on Windows.
+type Dlerror struct {
+	s string
+}
+
+func (e Dlerror) Error() string {
+	return e.s
+}