I have committed the attached patch to remove a check for obsolete NetBSD
aout releases from the 1990s.

Bootstrapped and tested on i386-unknown-netbsdelf6.1 and
x86_64-unknown-netbsd6.1.

    /Krister


2017-07-09  Krister Walfridsson  <krister.walfridsson@gmail.com>

 	* config.host (*-*-netbsd*): Remove check for aout NetBSD releases.