Merge from gnulib

Merge from gnulib

This incorporates:
2015-07-04 file-has-acl, acl-permissions: fix HP-UX typos
2015-07-03 set-permissions.c: adjust acl_from_mode's cpp guard
2015-07-02 update-copyright: fix test failure with perl >= 5.22
2015-07-01 gnulib-common.m4: change the ARFLAGS default to 'cr'
2015-07-01 acl: fix definition of acl_from_mode on FreeBSD
* build-aux/update-copyright, doc/misc/texinfo.tex, lib/acl-internal.h:
* lib/set-permissions.c, m4/gnulib-common.m4: Copy from gnulib.