message: Use https instead of git to clone utfcpp
diff: @@ -5,7 +5,7 @@ set(THIRDPARTY_DIR ${CMAKE_BINARY_DIR}/runtime/thirdparty)
  set(UTFCPP_DIR ${THIRDPARTY_DIR}/utfcpp)
  ExternalProject_Add(
  utfcpp
  - GIT_REPOSITORY "git://github.com/nemtrif/utfcpp"
  + GIT_REPOSITORY "https://github.com/nemtrif/utfcpp"
  GIT_TAG "v3.1.1"
  SOURCE_DIR ${UTFCPP_DIR}
  UPDATE_DISCONNECTED 1
  