This enables OpenOCD for the CC1312 LaunchPad.
All we need is:
- The Texas Instruments version of OpenOCD
(https://git.ti.com/cgit/sdo-emu/openocd)
- Set the `PROGRAMMER` environment variable to `openocd`.
- Connect a cc1312-launchpad and play with the commands.
Signed-off-by: Jean Pierre Dudey <jeandudey@hotmail.com>