==============

+ Fix a couple of portability issues in the testsuite.  Thanks to Rémi
  Duraffort for all the tests he made on his instance of Linaro LAVA.

+ Set $PWD to the value specified by the -w option, otherwise Bash pwd
  builtin might be confused under some specific circumstances.  Thanks
  to Jérémy Bobbio for the bug report.

+ Fix support for accessat and fchmodat syscalls: they have only three
  parameters, not four.  This bug was exposed by Gentoo's sandbox:

      proot -S gentoo-amd64-hardened+nomultilib-rootfs emerge util-linux