branch master updated (ecb232b -> 2973ebf)

[Leo Famulari]

lfam pushed a change to branch master
in repository guix.

      from  ecb232b   gnu: isc-dhcp: Update bundled bind to 9.9.10-P2 [fixes 
CVE-2017-{3142,3143}].
       new  bf7c369   gnu: Add nlohmann-json-cpp.
       new  5bc2d57   gnu: Add libebml.
       new  15f1d02   gnu: Add libmatroska.
       new  2973ebf   gnu: Add mkvtoolnix.

The 4 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/serialization.scm |  23 ++++++++
 gnu/packages/video.scm         | 120 +++++++++++++++++++++++++++++++++++++++++
 gnu/packages/xml.scm           |  22 ++++++++
 3 files changed, 165 insertions(+)