It is referenced from init.rc so it should be in bin just like the other drivers ran by init.

The targets specify the soft-float ABI already and -Csoft-float should likely
have never existed in the first place. It is unsound to mix crates compiled
with different float ABI's and the only stable way to get all crates to agree
on the soft float ABI is by specifying a target which uses the soft float ABI
anyway even without explicit -Csoft-float.

See also https://rust-lang.zulipchat.com/#narrow/stream/131828-t-compiler/topic/.60-Csoft-float.60.20considered.20harmful

This is necessary for ps2d to use redox-log.

It isn't set by default on Linux either and it makes the tempnam libc
function always create the temporary file in /tmp rather than prefer the
caller indicated location.

This makes it easier to make driver changes. And in the future other
recipes could potentially benefit from the same infrastructure too.

Without this the virtual addresses will not match the file offsets for
the final initfs blob on AArch64 as there it will align to 64k by
default.

This helps with debugging panics.

This will allow moving the system init configs to this place, keeping
/etc/init.d for local overrides.