branch core-updates updated (4655f51 -> 6f4b23e)

[Alex Kost]

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

      from  4655f51   gnu: xz: Update to 5.2.2.
       new  f7dbeb3   build-system/gnu: Set 'SOURCE_DATE_EPOCH'.
       new  6f4b23e   gnu: emacs: Honor 'SOURCE_DATE_EPOCH'.

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.


Summary of changes:
 gnu-system.am                                      |    1 +
 gnu/packages/emacs.scm                             |    3 ++-
 gnu/packages/patches/emacs-source-date-epoch.patch |   20 ++++++++++++++++++++
 guix/build/gnu-build-system.scm                    |    3 +++
 4 files changed, 26 insertions(+), 1 deletions(-)
 create mode 100644 gnu/packages/patches/emacs-source-date-epoch.patch