dev-python/scandir: new package.

dev-python/scandir: new package.

A better directory iterator and faster os.walk().

scandir() is a directory iteration function like os.listdir(), except that
instead of returning a list of bare filenames, it yields DirEntry objects that
include file type and stat information along with the name. Using scandir()
increases the speed of os.walk() by 2-20 times (depending on the platform and
file system) by avoiding unnecessary calls to os.stat() in most cases.

Required by dev-python/pathlib2[python2_7,python3_4].

Gentoo-Bug: https://bugs.gentoo.org/626120

Package-Manager: Portage-2.3.6, Repoman-2.3.1
Closes: https://github.com/gentoo/gentoo/pull/5207