BaseTools: Fix the regression issue after enbaling s_* an d_* macros in FDF.

BaseTools: Fix the regression issue after enbaling s_* an d_* macros in FDF.

Add the missing 'MacroDict' field in FfsInfStatement.

The issue is that BaseTools/Source/Python/GenFds/FfsInfStatement.py", line 448, in __ExtendMacro__
    String = GenFdsGlobalVariable.MacroExtend(String, self.MacroDict)
AttributeError: OptRomInfStatement instance has no attribute 'MacroDict'

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Yingke Liu <yingke.d.liu@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16099 6f19259b-4bc3-4df7-8a09-765794883524