[ox/std] Add option for building trace hook in shared library

deps/ox/src/ox/std/tracehook.cpp

@@ -0,0 +1,13 @@
+/*
+ * Copyright 2015 - 2021 gary@drinkingtea.net
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+extern "C"
+void oxTraceHook([[maybe_unused]] const char *file, [[maybe_unused]] int line,
+                 [[maybe_unused]] const char *ch, [[maybe_unused]] const char *msg) {
+}
+