Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild

Pull kbuild fix from Michal Marek:
 "The main kbuild branch ended up with a single commit this time, a fix
  to send errors to stderr"

* 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
  kbuild: Print errors to stderr