692833a28f
Add c_enum_min_bits target spec field, use for arm-none and thumb-none targets Fixes https://github.com/rust-lang/rust/issues/87917 <s>Haven't tested this yet, still playing around.</s> This seems to fix the issue.
rustc_target contains some very low-level details that are
specific to different compilation targets and so forth.
For more information about how rustc works, see the rustc dev guide.