- Copy stable/10@285827 to releng/10.2 in preparation for 10.2-RC1
builds.
- Update newvers.sh to reflect RC1.
- Update __FreeBSD_version to reflect 10.2.
- Update default pkg(8) configuration to use the quarterly branch.[1]

Discussed with: re, portmgr [1]
Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

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

MFC r274618,r276521:

MFC Note: text corrected for r274618

r274618:

Add reachover Makefiles for contrib/netbsd-tests/lib/msun

A variant of this code has been tested on amd64/i386 for some time by
EMC/Isilon on 10-STABLE/11-CURRENT. It builds on other architectures, but the
code will remain off until it's proven it works on virtual hardware or real
hardware on other architectures

Sponsored by: EMC / Isilon Storage Division

r276521:

Reset errno in :scalbnf_val and :scalbnl_val before running the tests so the
tested errno isn't stale

This was needed in order for the test to pass on amd64 with stable/10

Add reachover Makefiles for contrib/netbsd-tests/lib/librt

A variant of this code has been tested on amd64/i386 for some time by
EMC/Isilon on 10-STABLE/11-CURRENT. It builds on other architectures, but the
code will remain off until it's proven it works on virtual hardware or real
hardware on other architectures

Sponsored by: EMC / Isilon Storage Division