branch boost-1.60 created (now aaa16dd)

[Mark H. Weaver]

mhw pushed a change to branch boost-1.60
in repository guix.

        at  aaa16dd   gnu: boost: Update to 1.60.0.

This branch includes the following new commits:

       new  bc781df   gnu: boost: Use modify-phases.
       new  aaa16dd   gnu: boost: Update to 1.60.0.

The 2 revisions listed above as "new" are entirely new to this
repository and will be described in separate emails.  The revisions
listed as "adds" were already present in the repository and have only
been added to this reference.