Outdated config.guess / config.sub in release tarball

[jmarshall]

The config.guess and config.sub files in the current release tarball are dated 2018:

$ grep ^timestamp config.*
config.guess:timestamp='2018-02-24'
config.sub:timestamp='2018-02-22'

In particular they pre-date Apple silicon and hence cause the build failure for the first commit in bioconda/bioconda-recipes#49490.

In a Conda environment, ./config.guess (somewhat surprisingly) produces arm64-apple-darwin20.0.0 which causes this config.sub to fail:

$ ./config.sub arm64-apple-darwin20.0.0
Invalid configuration `arm64-apple-darwin20.0.0': machine `arm64-apple' not recognized

More recent versions of config.sub successfully produce aarch64-apple-darwin20.0.0, canonicalising as expected.