Install cmake files into same directory

Author: tcraigtyler

CMakeLists.txt

@@ -274,7 +274,7 @@ configure_package_config_file(
 install(FILES
     ${CMAKE_CURRENT_BINARY_DIR}/cmake/${PROJECT_NAME}Config.cmake
     ${CMAKE_CURRENT_BINARY_DIR}/cmake/${PROJECT_NAME}ConfigVersion.cmake
-    DESTINATION lib/cmake/${PROJECT_NAME})
+    DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME})
 
 # Optional additional targets: