branch xorg-updates updated (7dcf67c -> f948656)

[Mark H. Weaver]

mhw pushed a change to branch xorg-updates
in repository guix.

      from  7dcf67c   Merge branch 'master' into xorg-updates
      adds  d95523f   packages: Sort Scheme file lists used by 'fold-packages'.
      adds  a193b82   Optimize package-transitive-supported-systems.
      adds  afc720d   gnu: matplotlib: Comment out python2-matplotlib.
      adds  78a2745   build-system/python: Fix 'package-with-explicit-python'.
      adds  764c077   Revert "gnu: matplotlib: Comment out python2-matplotlib."
       new  f948656   Merge branch 'master' into xorg-updates

The 1 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.


Summary of changes:
 gnu/packages.scm             |   41 ++++++++++++++++------------
 guix/build-system/python.scm |   42 ++++++++++++----------------
 guix/packages.scm            |   61 ++++++++++++++++++++---------------------
 3 files changed, 71 insertions(+), 73 deletions(-)