gcc-cross: Bring back the dwarf fix for non-Linux targets

This changes brings back the fix in

commit f5f47b33
Author: Bernhard Rosenkränzer <bernhard.rosenkraenzer.ext@huawei.com>
Date:   Thu Oct 21 22:40:17 2021 +0200
    gcc: Use DWARF-4 by default on non-Linux targets

It was dropped when removing the local oniro version of gcc.

Signed-off-by: Andrei Gherzan <andrei.gherzan@huawei.com>