branch core-updates updated (866f469 -> be23412)

[Ludovic Courtès]

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

      from  866f469   gnu: gnutls: Update to 3.4.0.
       new  002c57c   lint: Add a 'derivation' checker.
       new  a1d5bb0   gnu: Add upower.
       new  be23412   services: Add upower.

The 3 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:
 doc/guix.texi                              |   21 +++++
 gnu-system.am                              |    2 +
 gnu/packages/gnome.scm                     |   50 +++++++++++
 gnu/packages/patches/upower-builddir.patch |   44 ++++++++++
 gnu/services/upower.scm                    |  122 ++++++++++++++++++++++++++++
 guix/scripts/lint.scm                      |   27 ++++++
 tests/lint.scm                             |   10 +++
 7 files changed, 276 insertions(+), 0 deletions(-)
 create mode 100644 gnu/packages/patches/upower-builddir.patch
 create mode 100644 gnu/services/upower.scm