[CMake] Use CMAKE_INSTALL_LIBDIR for lib dir.

May change lib-dir to lib64 on some systems.
Fixes RPATH issues on these systems.

scripts/cmake/ProjectSetup.cmake

 # Set build directories
-set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/bin)
-set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/lib)
-set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/lib)
+set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/${CMAKE_INSTALL_BINDIR})
+set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/${CMAKE_INSTALL_LIBDIR})
+set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/${CMAKE_INSTALL_LIBDIR})
 if(OGS_USE_CONAN AND MSVC)
     foreach(OUTPUTCONFIG ${CMAKE_CONFIGURATION_TYPES})
         string(TOUPPER ${OUTPUTCONFIG} OUTPUTCONFIG)