Add option to stop control on system time jump

[at-wat]

• Explicitly change control mode to STOP before exit #96
• Stop control on system time jump #192

Example behavior:

$ ./ypspur-coordinator -p ../test/vehicle.param --without-device --exit-on-time-jump; echo $?
++++++++++++++++++++++++++++++++++++++++++++++++++
YamabicoProject-Spur
 Ver. 1.21.0 (fb455fb)
++++++++++++++++++++++++++++++++++++++++++++++++++
Device Information
 Port    : n/a (--without-device mode)
YP-Spur coordinator started.
Command analyzer started.
Trajectory control loop started.

Make system time jumped by date -s command

Detected system time jump: 4.49620s
Trajectory control loop stopped.
Connection to /dev/ttyUSB0 was closed.
Command analyzer stopped.
1

[at-wat]

Tested with an actual motor driver

[at-wat]

@Taka-Kazu please take a look