miraclecast: new package

[Thomas:
  - add hash file
  - fix license information: use comma as a separator in
    <pkg>_LICENSE, and htable is under LGPLv2.1+ and not GPLv2.1+
    (which doesn't exist)]

Signed-off-by: Ryan Barnett <ryanbarnett3@gmail.com>
CC: Baruch Siach <baruch@tkos.co.il>
CC: Yann E. MORIN <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>