REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1210 FixedAtBuild PCD is suggested to be used instead of FeatureFlag PCD so extend this tool to support. Also skipped PCDs which commented out by '#'. Test: Verified with FixedAtBuild PCD for including or excluding lines in generated UPD header files successfully. Cc: Jiewen Yao <Jiewen.yao@intel.com> Cc: Gao Liming <liming.gao@intel.com> Cc: Zhu Yonghong <yonghong.zhu@intel.com> Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Chasel Chiu <chasel.chiu@intel.com>