Carsey, Jaben 6b26dd7165 BaseTools: replace a dict with a set
As we never use the values, just keep the keys in a set.

Cc: Liming Gao <liming.gao@intel.com>
Cc: Yonghong Zhu <yonghong.zhu@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Jaben Carsey <jaben.carsey@intel.com>
Reviewed-by: Yonghong Zhu <yonghong.zhu@intel.com>
2018-04-10 10:05:12 +08:00
..
2018-02-08 11:09:42 +08:00