Handled permanent Gecko hung with power reset.

1. Incase gecko hung forever,it can be restarted with gpio reset.
2. Done some indentation of code.
3. Reduced timer timeout.
4. Removed unwanted debug logs.

	modified:   src/Makefile
	modified:   src/gecko_interface.c
	new file:   src/gpio.c
	new file:   src/gpio.h
	modified:   src/serial_core.c
	modified:   src/serial_core.h
	modified:   src/test1.c
	modified:   src/timer_api.c
Added script.config for gpio pin settings

Gecko master reset pin is connected to PG4 pin.
configuration of that is in script.config file

	new file:   src/script.fex
Added comment

	modified:   src/gpio.c