[MacPorts] #54009: libsndfile @1.0.27: update to 1.0.28

[MacPorts]

#54009: libsndfile @1.0.27: update to 1.0.28
----------------------+------------------------
 Reporter:  l2dy      |      Owner:  janstary
     Type:  update    |     Status:  new
 Priority:  Normal    |  Milestone:
Component:  ports     |    Version:
 Keywords:  security  |       Port:  libsndfile
----------------------+------------------------
 CVE-2017-7585 CVE-2017-7586 CVE-2017-7741 CVE-2017-7742.

 All low impact from Red Hat CVE Database.

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Ticket URL: <https://trac.macports.org/ticket/54009>
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