bnd driver: Define bnd property to indicate which tool is driving bnd

Signed-off-by: BJ Hargrave <bj@bjhargrave.com>
Merge pull request #571 from bjhargrave/bnd-driver

bnd driver: Define bnd property to indicate which tool is driving bnd
bnd driver: Set bnd property to indicate which tool is driving bnd

gradle and bnd command line are added in this commit.

Signed-off-by: BJ Hargrave <bj@bjhargrave.com>
Merge pull request #572 from bjhargrave/bnd-driver

bnd driver: Set bnd property to indicate which tool is driving bnd