misc/174405: [build] make installkernel shouldn't check for existence of user accounts

[bdrewery at FreeBSD.org]

Synopsis: [build] make installkernel shouldn't check for existence of user accounts

Responsible-Changed-From-To: freebsd-bugs->bdrewery
Responsible-Changed-By: bdrewery
Responsible-Changed-When: Tue Apr 23 07:28:30 CDT 2013
Responsible-Changed-Why: 
I'll work on fixing this.

http://www.freebsd.org/cgi/query-pr.cgi?pr=174405