Cleanup trailing whitespaces

source/App/EncoderApp/EncApp.cpp

source/App/EncoderApp/EncApp.h

source/App/EncoderApp/EncAppCfg.cpp

source/App/EncoderApp/EncAppCfg.h

source/App/SEIRemovalApp/SEIRemovalApp.cpp

source/App/StreamMergeApp/StreamMergeApp.cpp

source/Lib/CommonLib/Buffer.cpp

source/Lib/CommonLib/CodingStatistics.h

source/Lib/CommonLib/CodingStructure.cpp

source/Lib/CommonLib/CodingStructure.h

source/Lib/CommonLib/Common.h

source/Lib/CommonLib/CommonDef.h

source/Lib/CommonLib/Contexts.cpp

source/Lib/CommonLib/Contexts.h

source/Lib/CommonLib/InterPrediction.cpp

source/Lib/CommonLib/InterPrediction.h

source/Lib/CommonLib/IntraPrediction.cpp

source/Lib/CommonLib/IntraPrediction.h

source/Lib/CommonLib/LoopFilter.h

source/Lib/CommonLib/MatrixIntraPrediction.cpp