package/xorcurses: new package

package/xorcurses: new package

XorCurses is a remake of the 8-bit game 'Xor' by Astral Software.
Your task is to roam around a series of mazes where you have to
collect all blue masks before finding the exit. You have two 'shields'
(players) and you can use either one at any time and switch between
them. While the first level is simply a matter of navigation, the
following levels introduce further objects like bombs and teleports,
which have to be used right to solve the puzzles.

Signed-off-by: Thomas Huth <huth@tuxfamily.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>