BaseTools: report build time measured by module of EDKII Build

In the build report, we add AutoGen Phase, Make Phase and GenFds Phase
time duration in the Platform Summary section, and we also add a item
in Module section to display module and library's build time.

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

BaseTools/Source/Python/AutoGen/AutoGen.py

@@ -2695,6 +2695,7 @@ class ModuleAutoGen(AutoGen):
 
         self.BuildDatabase = self.Workspace.BuildDatabase
         self.BuildRuleOrder = None
+        self.BuildTime      = 0
 
         self._Module          = None
         self._Name            = None