license: typo fix

Change-Id: I2761bae7295a2d68406b063fbe41790a912b3cb9
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>

Add license file for the repository

Cover binary release and source code tools.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Change-Id: I71287e04f887a726ec316d297b9a0b1feb96c2b3