The prompt and help information are missing in MdePkg.uni. https://bugzilla.tianocore.org/show_bug.cgi?id=1600 v2:Fix the error message of help and prompt information. Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Shenglei Zhang <shenglei.zhang@intel.com> Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>