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>

BaseTools/Source/Python/Workspace/BuildClassObject.py

@@ -118,7 +118,7 @@ class StructurePcd(PcdClassObject):
         self.PcdMode = None
         self.SkuOverrideValues = collections.OrderedDict({})
         self.FlexibleFieldName = None
-
+        self.StructName = None
     def __repr__(self):
         return self.TypeName
 
@@ -170,6 +170,7 @@ class StructurePcd(PcdClassObject):
             self.DefaultFromDSC=None
             self.OverrideValues = PcdObject.SkuOverrideValues if PcdObject.SkuOverrideValues else self.SkuOverrideValues
             self.FlexibleFieldName = PcdObject.FlexibleFieldName if PcdObject.FlexibleFieldName else self.FlexibleFieldName
+            self.StructName = PcdObject.DatumType if PcdObject.DatumType else self.StructName
 
 ## LibraryClassObject
 #