[Automake-NG] [FYI] Merge branch 'master' into ng/master

[Stefano Lattarini]

commit 5178a2c72f23deea3e1e17a3bf029687a4eca97d
Merge: b757a99 ef098fa
Author: Stefano Lattarini <stefano.lattar...@gmail.com>
Date:   Fri May 24 13:37:56 2013 +0200

    Merge branch 'master' into ng/master

    * master:
      tests: use append mode to capture parallel make output
      tests: new convenience target 'check-parallel'

    Signed-off-by: Stefano Lattarini <stefano.lattar...@gmail.com>