[OE-core] [PATCH] fixing python3 build for mips softfloat targets

[Burton, Ross]

> > The shortlog should be "python3: fix build on softfloat mips".
> Do you want me to send an v2 for it?

Please do, with the shortlog fixed, removal of the word 'backport'
from the message, and your Signed-off-by/Upstream-Status: Submitted
[https://github.com/python/cpython/pull/13196] in the patch you are
adding.

Ross