intel_edison_fab_c.c: use snprintf(), not sprintf(), to avoid overflows
intel_edison_fab_c.c: use snprintf(), not sprintf(), to avoid overflows

Signed-off-by: Alex Tereschenko <c1573d8a2714f7b294fae3af1bb5e489479ca966@gmail.com>

malikabhi05/mraa,arfoll/mraa,yongli3/mraa,yongli3/mraa,arfoll/mraa,alext-mkrs/mraa,Propanu/mraa,alext-mkrs/mraa,arfoll/mraa,stefan-andritoiu/mraa,Propanu/mraa,malikabhi05/mraa,g-vidal/mraa,g-vidal/mraa,Propanu/mraa,intel-iot-devkit/mraa,KurtE/mraa,g-vidal/mraa,Propanu/mraa,g-vidal/mraa,alext-mkrs/mraa,yongli3/mraa,arfoll/mraa,Propanu/mraa,yongli3/mraa,KurtE/mraa,intel-iot-devkit/mraa,yongli3/mraa,stefan-andritoiu/mraa,alext-mkrs/mraa,intel-iot-devkit/mraa,intel-iot-devkit/mraa,malikabhi05/mraa,malikabhi05/mraa,KurtE/mraa,stefan-andritoiu/mraa,intel-iot-devkit/mraa,stefan-andritoiu/mraa,KurtE/mraa,KurtE/mraa,g-vidal/mraa,alext-mkrs/mraa,malikabhi05/mraa,arfoll/mraa,stefan-andritoiu/mraa