Add the full text of the CC0-1.0 license to the OpenOCD tree. It
was copied directly from:
https://spdx.org/licenses/CC0-1.0.html#licenseText
Add the required tags for reference and tooling.
Change-Id: Iae9c1431b6ffdd68ad5780deb78a257edb0b67f3
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/7994
Tested-by: jenkins
Reviewed-by: Karl Palsson <karlp@tweak.au>