BaseTools: Report Structure PCD value and SKU, DefaultStore info

BaseTools: Report Structure PCD value and SKU, DefaultStore info

https://bugzilla.tianocore.org/show_bug.cgi?id=706
Add Structure PCD support for Build report. Structure PCD field value described
in DEC/DSC will be display in build report. And, PCD value for each SKU and
Default store will also be shown in build report.

Contributed-under: TianoCore Contribution Agreement 1.1
Reviewed-by: Yonghong Zhu <yonghong.zhu@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>