meta-toolchain-arago-base-tisdk: copy licenses
meta-toolchain-arago-base-tisdk: copy licenses

* Added code to copy the ${DEPLOY_DIR}/licenses directory
  into the SDK.
* Create a README file explaining what the licenses directory
  is for.

Signed-off-by: Chase Maupin <874d7d4fa211492c1868f6a91442712d37040f21@ti.com>
Signed-off-by: Denys Dmytriyenko <e7d361c7f6c045f0c4fa54d2afc4a237f30bc767@denix.org>

mrchapp/arago-da830,mrchapp/arago-da830,mrchapp/arago-da830