Scott McMurray 754f488d46 Use preserve_mostcc for extern "rust-cold"
As experimentation in 115242 has shown looks better than `coldcc`.

And *don't* use a different convention for cold on Windows, because that actually ends up making things worse.

cc tracking issue 97544
2023-08-26 17:42:59 -07:00
..
2023-08-25 19:05:38 +00:00