Move base32 code to (guix base32).
* guix/utils.scm (bytevector-quintet-ref, bytevector-quintet-ref-right,
bytevector-quintet-length, bytevector-quintet-fold,
bytevector-quintet-fold-right, make-bytevector->base32-string,
%nix-base32-chars, %rfc4648-base32-chars, bytevector->base32-string,
bytevector->nix-base32-string, bytevector-quintet-set!,
bytevector-quintet-set-right!, base32-string-unfold,
base32-string-unfold-right, make-base32-string->bytevector,
base32-string->bytevector, nix-base32-string->bytevector): Move to...
* guix/base32.scm: ... here. New file.
* tests/utils.scm (%nix-hash, "bytevector->base32-string",
"base32-string->bytevector", "nix-base32-string->bytevector", "sha256
& bytevector->base32-string"): Move to...
* tests/base32.scm: ... here. New file
* guix-download.in, guix/derivations.scm, guix/packages.scm,
guix/snix.scm, tests/builders.scm, tests/derivations.scm: Adjust
accordingly.
* guix.scm (%public-modules): Add `base32'.
ddc29a782e