rtc/DataLogger/DataLogger.cpp: sync DataLogger time to simulation time when simulating
rtc/DataLogger/DataLogger.cpp rtc/DataLogger/DataLogger.h: remove needless variable tm from member method log()
Merge branch 'master' of https://github.com/fkanehiro/hrpsys-base into sync-log-time-to-sim-time
Merge pull request #276 from kindsenior/sync-log-time-to-sim-time

シミュレータ使用時のDataLoggerのログの時刻 (#267)