message: Install cmake files into lib/cmake, not just cmake.
  cmake files are commonly installed into lib/cmake.
diff: @@ -228,7 +228,7 @@ export(EXPORT MaterialX
  # Package for using the installed build
  install(EXPORT MaterialX
  - DESTINATION cmake
  + DESTINATION ${MATERIALX_INSTALL_LIB_PATH}/cmake
  FILE MaterialXConfig.cmake)
  install(FILES "${CMAKE_BINARY_DIR}/cmake/MaterialXConfigVersion.cmake"
  - DESTINATION cmake)
  + DESTINATION ${MATERIALX_INSTALL_LIB_PATH}/cmake)
  