MFC r323275, r324112

r323275:
Add basic tests for chflags, mkdir, rcp, and rmdir

Add basic command line parsing test coverage for these utilities. The tests
were automatically generated based on their man pages. These tests can be
expanded by hand for more thorough coverage. The aim is to generate very
basic amount of test coverage for all the utilities in the base system.

Submitted by: shivansh
Reviewed by: asomers, brooks
Sponsored by: Google, Inc (GSoC 2017)
Differential Revision: https://reviews.freebsd.org/D12036

r324112:
Fix Makefile entries from r323275

Reported by: Vladimir Zakharov <zakharov.vv@gmail.com>
Reviewed by: ngie
X-MFC-With: 323275

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Default to WARNS=2. Binary builds that cannot handle this must explicitly
set WARNS=0.

Reviewed by: mike

WARNS= -> WARNS?=

Submitted by: Mike Barcroft <mike@q9media.com>

Silence WARNS=2 and BDECFLAGS on alpha and i386

MFC after: 1 week

$Id$ -> $FreeBSD$

Revert $FreeBSD$ to $Id$

Make the long-awaited change from $Id$ to $FreeBSD$

This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.

Boy, I'm glad we're not using sup anymore. This update would have been
insane otherwise.

Added $Id$

This commit was generated by cvs2svn to compensate for changes in r1556,
which included commits to RCS files with non-trunk default branches.

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