[Bug c/83294] int32_t & related definitions wrong with -funsigned-bitfields

[bugdal at aerifal dot cx]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83294

--- Comment #7 from Rich Felker <bugdal at aerifal dot cx> ---
Thanks. I think between footnote 125 and DR#315 the intent is clear and this
bug report stands as written.