MFC r282057,r282092,r282106:

MFC r282057,r282092,r282106:

r282057:

Build/install libc, librt, libthr, and msun NetBSD test suites on all
architectures

r282092 (by andrew):

Correct the spelling of MACHINE_CPUARCH, MACHINE_CPU is not set on arm64.

r282106:

Remove per-architecture checks for enabling HAVE_FENV_H

The conditional came from NetBSD, where only select architectures have this
header/support

All architectures on FreeBSD have the necessary support though, so the
conditional's completely unnecessary

make tinderbox done on all architectures (including arm64, where the issue
occurred before) this time

git-svn-id: svn://svn.freebsd.org/base/stable/10@282854 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f