bug#22391: 'make check' fails on master.

[Mathieu Lirzin]

======================================
   GNU Guix 0.9.1: ./test-suite.log
======================================

# TOTAL: 56
# PASS:  53
# SKIP:  2
# XFAIL: 0
# FAIL:  1
# XPASS: 0
# ERROR: 0

.. contents:: :depth: 2

SKIP: tests/containers
======================

SKIP tests/containers.scm (exit status: 77)

FAIL: tests/gem
===============

random seed for tests: 1453029209
%%%% Starting test gem  (Writing full log to "gem.log")

;;; (fail (package (name "ruby-foo") (version "1.0.0") (source (origin (method 
url-fetch) (uri (rubygems-uri "foo" version)) (sha256 (base32 
"1a270mlajhrmpqbhxcqjqypnvgrq4pgixpv3w9gwp1wrrapnwrzk")))) (build-system 
ruby-build-system) (propagated-inputs (quasiquote (("bundler" (unquote 
bundler)) ("ruby-bar" (unquote ruby-bar))))) (synopsis "This package provides a 
cool gem") (description "This package provides a cool gem") (home-page 
"https://example.com";) (license (list expat asl2.0))) #f)
tests/gem.scm:46: FAIL gem->guix-package
# of unexpected failures  1
FAIL tests/gem.scm (exit status: 1)

SKIP: tests/guix-environment-container
======================================

+ set -e
+ guix environment --version
guix environment (GNU Guix) 0.9.1
Copyright (C) 2016 the Guix authors
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
+ guile -c '((@@ (guix scripts environment) assert-container-features))'
error: cannot create container: unprivileged user cannot create user namespaces
error: please set /proc/sys/kernel/unprivileged_userns_clone to "1"
+ exit 77
SKIP tests/guix-environment-container.sh (exit status: 77)

gem.log
Description: Text document

config.log
Description: Text document