[FYI] Merge branch 'maint' into master

[Stefano Lattarini]

commit 12f0caf6d2d2c013c03200a12449d5f97428e0cf
Merge: e4fbe2a 70b503a
Author: Stefano Lattarini <stefano.lattar...@gmail.com>
Date:   Sat Aug 4 23:45:39 2012 +0200

    Merge branch 'maint'

    * maint:
      tests: fix a spurious XPASS on OpenIndiana
      tests: avoid spurious failure of 't/vala-vapi.sh' on OpenIndiana
      tests: avoid spurious failure of 't/uninstall-fail.sh' on OpenIndiana
      tests: reimplement wrappers for automake and aclocal in perl
      tests: work around a ksh bug w.r.t. ${1+"$@"}
      depcomp: style changes to Portland Group Compilers support
      depcomp: initial support for Portland Group Compilers