Log Message:
Remove the special-case disabling of earm and powerpc,
which references my own old post from mid-2020 at which time
I had problems building rust for earmv7hf "natively".
That problem has long since been resolved.  Not sure why
powerpc got the same treatment -- with this removed this package
builds fine with rust 1.56.0 on NetBSD/macppc 9.99.88.