branch wip-gexp-grafts created (now fddade9)

[Ludovic Courtès]

civodul pushed a change to branch wip-gexp-grafts
in repository guix.

        at  fddade9   gexp: Compilers can now provide a procedure returning 
applicable grafts.

This branch includes the following new commits:

       new  992e9c8   packages: Factorize computation of the replacement graft.
       new  fddade9   gexp: Compilers can now provide a procedure returning 
applicable grafts.

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.