Modified to support the rename of strftime.cxx to timehelper.cxx.
Modified to support the rename of strftime.cxx to timehelper.cxx.

hunter-packages/log4cplus,ccpaging/log4cplus,csuideal/log4cplus,hunter-packages/log4cplus,hunter-packages/log4cplus,csuideal/log4cplus,ccpaging/log4cplus,csuideal/log4cplus,hunter-packages/log4cplus,ccpaging/log4cplus,ccpaging/log4cplus,csuideal/log4cplus