branch master updated (73749ae -> a01f157)

[Leo Famulari]

lfam pushed a change to branch master
in repository guix.

      from  73749ae   gnu: youtube-dl: Update to 2017.04.28.
       new  a01f157   gnu: ghostscript: Fix CVE-2017-8291.

The 1 revisions listed above as "new" are entirely new to this
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Summary of changes:
 gnu/local.mk                                       |  1 +
 gnu/packages/ghostscript.scm                       | 13 ++++
 .../patches/ghostscript-CVE-2017-8291.patch        | 73 ++++++++++++++++++++++
 3 files changed, 87 insertions(+)
 create mode 100644 gnu/packages/patches/ghostscript-CVE-2017-8291.patch