bump(sys-libs/ncurses): sync with upstream

In particular we need this:
  23 Oct 2012; Mike Frysinger <vapier@gentoo.org> ncurses-5.9-r2.ebuild:
  Bypass dumb pkg-config install checks #438922 by Benjamin Peterson.
Merge pull request #22 from marineam/ncurses

bump(sys-libs/ncurses): sync with upstream