Install busybox test suite and run it as ptest.
(From OE-Core rev: 0d29dc5b5f7742df60fdba90835ef77425963bde)
Signed-off-by: Anders Roxell <anders.roxell@enea.com>
Signed-off-by: Björn Stenberg <bjst@enea.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
