[m-rev.] for review: fix mantis bug 514

[Julien Fischer]

Hi Zoltan,

On Fri, 24 Jul 2020, Zoltan Somogyi wrote:

> The attached diff has bootchecked in a deep profiling grade both with and without
> -fno-common, and I am just now testing it in other LLDS grades, but my laptop
> has gcc 7.5. Does anyone have gcc 10? If so, could you please try it out,
> either before or after review (by anyone) or commit?

It succesfully bootchecks in grade asm_fast.gc.profdeep.stseg using gcc
10.1.1 on x86_64 Fedora 32.

Julien.