enable gaussian white noise in C++ test

CMakeLists.txt

...otTrajectoryGeneration/OnLineFootTrajectoryGeneration.cpp

src/Mathematics/PLDPSolver.cpp

src/PatternGeneratorInterfacePrivate.cpp

src/ZMPRefTrajectoryGeneration/DynamicFilter.cpp

src/ZMPRefTrajectoryGeneration/ZMPVelocityReferencedSQP.cpp

src/ZMPRefTrajectoryGeneration/nmpc_generator.cpp

tests/TestHerdt2010DynamicFilter.cpp

tests/TestNaveau2015.cpp