ports/158967: sysutils/bsdadminscripts: pkg_libchk doesn't work at all when run from bash

[Eygene Ryabinkin]

The following patch fixes the issue:
  http://codelabs.ru/fbsd/ports/bsdadminscripts/fix-missing-OSTYPE.diff

Tinderbox builds are OK:
  - http://gpf.codelabs.ru/tb-logs/mine-9/bsdadminscripts-6.1.1_1.log
  - http://gpf.codelabs.ru/tb-logs/mine-8/bsdadminscripts-6.1.1_1.log
  - http://gpf.codelabs.ru/tb-logs/mine-7/bsdadminscripts-6.1.1_1.log
-- 
Eygene Ryabinkin                                        ,,,^..^,,,
[ Life's unfair - but root password helps!           | codelabs.ru ]
[ 82FE 06BC D497 C0DE 49EC  4FF0 16AF 9EAE 8152 ECFB | freebsd.org ]
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