Allow usage of cmake files from build tree

CMakeLists.txt

@@ -50,11 +50,9 @@ install(
     DESTINATION ${INSTALL_CONFIGDIR}
 )
 
-install(
-    FILES
-        ${CMAKE_CURRENT_SOURCE_DIR}/cmake/TrackerPlugin.cmake
-    DESTINATION ${INSTALL_CONFIGDIR}/Modules/${PROJECT_NAME}
-)
+file(MAKE_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/Modules/${PROJECT_NAME})
+configure_file(cmake/TrackerPlugin.cmake Modules/${PROJECT_NAME} COPYONLY)
+install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/Modules DESTINATION "${INSTALL_CONFIGDIR}")
 
 set(CPACK_GENERATOR "TXZ")
 set(CPACK_PACKAGE_VERSION "${SOURCE_VERSION}")