Add macro RPR_ENABLE.

source/App/EncoderApp/EncAppCfg.cpp

source/Lib/CommonLib/AdaptiveLoopFilter.h

source/Lib/CommonLib/BilateralFilter.cpp

source/Lib/CommonLib/CodingStructure.cpp

source/Lib/CommonLib/CodingStructure.h

source/Lib/CommonLib/InterPrediction.cpp

source/Lib/CommonLib/Picture.cpp

source/Lib/CommonLib/SampleAdaptiveOffset.cpp

source/Lib/CommonLib/SampleAdaptiveOffset.h

source/Lib/CommonLib/Slice.cpp

source/Lib/CommonLib/TypeDef.h

source/Lib/CommonLib/UnitTools.cpp

source/Lib/CommonLib/UnitTools.h

source/Lib/EncoderLib/EncGOP.cpp

source/Lib/EncoderLib/EncLib.cpp

source/Lib/EncoderLib/InterSearch.cpp