Fix for CMake 3.31 warning CMP0177 (#1309)

Normalizing the include file path before calling install

Fixes #1308

Build/CMakeLists.txt

@@ -293,7 +293,8 @@ if (ENABLE_INSTALL)
 		string(REPLACE ${PHYSICS_REPO_ROOT} "" RELATIVE_SRC_FILE ${SRC_FILE})
 		get_filename_component(DESTINATION_PATH ${RELATIVE_SRC_FILE} DIRECTORY)
 		if (NOT RELATIVE_SRC_FILE MATCHES "\.cpp")
-			install(FILES ${SRC_FILE} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/${DESTINATION_PATH})
+			cmake_path(SET DST_FILE NORMALIZE "${CMAKE_INSTALL_INCLUDEDIR}/${DESTINATION_PATH}")
+			install(FILES ${SRC_FILE} DESTINATION ${DST_FILE})
 		endif()
 	endforeach()