RTOS2/RTX5: Enhanced RTX5 Blinky example Abstract text about switching to other Cortex-M class devices.
RTOS2/RTX5: Enhanced RTX5 Blinky example Abstract text about
switching to other Cortex-M class devices.

Change-Id: I454694f08be711bfc93e4ec8c07d5494d80085ca

ARM-software/CMSIS_5,ARM-software/CMSIS_5,JonatanAntoni/CMSIS_5,ARM-software/CMSIS_5,ARM-software/CMSIS_5,ARM-software/CMSIS_5,JonatanAntoni/CMSIS_5,JonatanAntoni/CMSIS_5,JonatanAntoni/CMSIS_5,ARM-software/CMSIS_5,JonatanAntoni/CMSIS_5,JonatanAntoni/CMSIS_5