This patch add new option --dummy file, and we compare the dummpy file with input file to decide whether we need to set PROCESSING_REQUIRED value. Cc: Liming Gao <liming.gao@intel.com> Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Yunhua Feng <yunhuax.feng@intel.com> Reviewed-by: Liming Gao <liming.gao@intel.com>