[PATCH] BaseTool: Fixed the incorrect cache key.

[BobCF <bob.c.feng@intel.com>]

From: "bob.c.feng@intel.com" <bob.c.feng@intel.com>

This patch is to fix the incorrect cache key of
skip ModuleAutoGen cache.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Bob Feng <bob.c.feng@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
---
 BaseTools/Source/Python/AutoGen/AutoGen.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/BaseTools/Source/Python/AutoGen/AutoGen.py b/BaseTools/Source/Python/AutoGen/AutoGen.py
index b27290989e..54c6b7330f 100644
--- a/BaseTools/Source/Python/AutoGen/AutoGen.py
+++ b/BaseTools/Source/Python/AutoGen/AutoGen.py
@@ -4320,7 +4320,7 @@ class ModuleAutoGen(AutoGen):
     #  If any source file is newer than the module than we cannot skip
     #
     def CanSkip(self):
-        if self.MetaFile in GlobalData.gSikpAutoGenCache:
+        if self.MakeFileDir in GlobalData.gSikpAutoGenCache:
             return True
         if not os.path.exists(self.GetTimeStampPath()):
             return False
@@ -4340,7 +4340,7 @@ class ModuleAutoGen(AutoGen):
                     ModuleAutoGen.TimeDict[source] = os.stat(source)[8]
                 if ModuleAutoGen.TimeDict[source] > DstTimeStamp:
                     return False
-        GlobalData.gSikpAutoGenCache.add(self.MetaFile)
+        GlobalData.gSikpAutoGenCache.add(self.MakeFileDir)
         return True
 
     def GetTimeStampPath(self):
-- 
2.18.0.windows.1