branch core-updates updated (ac84175 -> 4631206)

[guix-commits]

civodul pushed a change to branch core-updates
in repository guix.

    from ac84175  gnu: cmake: Fix cross-compilation.
     new 68dbd5c  gexp: Move 'file-mapping->tree' to (guix store).
     new 4631206  derivations: Import modules with 'add-file-tree-to-store'.

The 2 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.


Summary of changes:
 guix/derivations.scm | 61 +++++++++++-----------------------------------------
 guix/gexp.scm        | 43 ------------------------------------
 guix/store.scm       | 40 ++++++++++++++++++++++++++++++++++
 3 files changed, 53 insertions(+), 91 deletions(-)