Update cmake files.

.gitlab-ci.yml

3rdParty/MuParser/CMakeLists.txt

3rdParty/MuParser/include/muParser.h

3rdParty/MuParser/include/muParserBase.h

3rdParty/MuParser/include/muParserDLL.h

3rdParty/googletest/CMakeLists.txt

3rdParty/googletest/googlemock/CMakeLists.txt

3rdParty/googletest/googletest/CMakeLists.txt

3rdParty/metis/metis-5.1.1/GKlib/GKlibSystem.cmake

3rdParty/metis/metis-5.1.1/libmetis/CMakeLists.txt

CMake/3rd.cmake

CMake/3rd/OpenMP.cmake

CMake/3rd/boost.cmake

CMake/3rd/cuda.cmake

CMake/3rd/mpi.cmake

CMake/CMakeSetCompilerFlags.cmake

CMake/VirtualFluidsMacros.cmake

CMake/cmake_config_files/PHOENIX.config.cmake

CMake/compilerflags/AppleClang.cmake

CMake/compilerflags/Clang.cmake