scripts: Add support for 'make debug' using Segger JLink on NXP boards

Adds a new debug support script using Segger JLink and configures all
NXP boards so they can use it. Tested with Segger JLink GDB server
V6.14b and OpenSDA v2.1 firmware.

Change-Id: Ia1b297d9c93d21db61379e22f27ae54cda3ad461
Signed-off-by: Maureen Helm <maureen.helm@nxp.com>
6 files changed