mraa: rename from maa to mraa

Signed-off-by: Thomas Ingleby <thomas.c.ingleby@intel.com>
ipk: replace existing maa if installed

Signed-off-by: Thomas Ingleby <thomas.c.ingleby@intel.com>
maa: update to 0.4.0

Signed-off-by: Thomas Ingleby <thomas.c.ingleby@intel.com>