BaseTool/VfrCompile: Add missing question opcode

BaseTool/VfrCompile: Add missing question opcode

The function CheckQuestionOpCode is to check whether the opcode
is question opcode, but it misses two question opcodes:
'EFI_IFR_REF_OP' and 'EFI_IFR_RESET_BUTTON'. Now add them.

Cc: Liming Gao <liming.gao@intel.com>
Cc: Eric Dong <eric.dong@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Dandan Bi <dandan.bi@intel.com>
Reviewed-by: Eric Dong <eric.dong@intel.com>
Reviewed-by: Yonghong Zhu <yonghong.zhu@intel.com>