Package upgrade: libbsd

Alpine version: [0.6.0](http://lists.freedesktop.org/archives/libbsd/2013-July/000091.html) (2013-07-14)
Latest version: [0.7.0](http://lists.freedesktop.org/archives/libbsd/2014-July/000101.html) (2014-07-28)

(from redmine: issue id 4613, created on 2015-09-05, closed on 2015-12-18)

• Changesets:
  • Revision 3d2f807a on 2015-09-09T11:23:04Z:

main/libbsd: upgrade to 0.7.0

fixes #4613

• Revision f0e3ae39 by Natanael Copa on 2015-12-17T15:39:22Z:

main/libbsd: upgrade to 0.8.0

fixes #4613

• Revision 4dfa1af4 by Natanael Copa on 2015-12-17T15:43:37Z:

main/libbsd: upgrade to 0.8.1

fixes #4613