package/mraa: bump version to 0.9.1

Removed patches applied upstream:
https://github.com/intel-iot-devkit/mraa/commit/86a0e10c037e5c069c48012f169f9e8e2587a0ef
https://github.com/intel-iot-devkit/mraa/commit/a87a104efeb83d4e762992e5be3b8908e6d2bf40



Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>