Add the full text of the BSD 1-clause license.
It was copied directly from:
https://spdx.org/licenses/BSD-1-Clause.html#licenseText
Add the required tags for reference and tooling.
Change-Id: I71444e6a45d0e77fc57220cf1d579c010a27fdf3
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: http://openocd.zylin.com/5972
Tested-by: jenkins