9f14de3 BaseTools: report error HiiString in HII format PCD must not be empty

Authored and Committed by Yonghong Zhu 6 years ago
    BaseTools: report error HiiString in HII format PCD must not be empty
    
    Add a check that HiiString field in the HII format PCD entry must not
    be an empty string.
    
    Cc: Liming Gao <liming.gao@intel.com>
    Contributed-under: TianoCore Contribution Agreement 1.0
    Signed-off-by: Yonghong Zhu <yonghong.zhu@intel.com>
    Reviewed-by: Liming Gao <liming.gao@intel.com>