branch core-updates updated (19c2876 -> 8c42a25)

[guix-commits]

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

    from 19c2876  gnu: cups-filters: Update to 1.27.4.
     new 4659e04  gnu: libffi: Fix building on powerpc.
     new 8c42a25  gnu: icu4c: Update to 67.1.

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:
 gnu/local.mk                                       |   2 +-
 gnu/packages/icu4c.scm                             |   8 +-
 gnu/packages/libffi.scm                            |   5 +-
 gnu/packages/patches/icu4c-CVE-2020-10531.patch    | 127 -------------------
 .../patches/libffi-3.3-powerpc-fixes.patch         | 138 +++++++++++++++++++++
 5 files changed, 145 insertions(+), 135 deletions(-)
 delete mode 100644 gnu/packages/patches/icu4c-CVE-2020-10531.patch
 create mode 100644 gnu/packages/patches/libffi-3.3-powerpc-fixes.patch