branch wip-riscv created (now 4c61a03)

[guix-commits]

efraim pushed a change to branch wip-riscv
in repository guix.

      at 4c61a03  WIP: bootstrap: Add support for riscv64-linux.

This branch includes the following new commits:

     new 5faa70e  gnu: bootstrap-tarballs: Build with gcc-7.
     new 2a8edff  gnu: bootstrap-tarballs: Use guile-3.0 bootstrap tarball.
     new 4c61a03  WIP: bootstrap: Add support for riscv64-linux.

The 3 revisions listed above as "new" are entirely new to this
repository and will be described in separate emails.  The revisions
listed as "add" were already present in the repository and have only
been added to this reference.