BaseTools: Remove equality operator with None

replace "== None" with "is None" and "!= None" with "is not None"

Cc: Yonghong Zhu <yonghong.zhu@intel.com>
Cc: Liming Gao <liming.gao@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>

BaseTools/Source/Python/Workspace/BuildClassObject.py

@@ -212,7 +212,7 @@ class LibraryClassObject(object):
     def __init__(self, Name = None, SupModList = [], Type = None):
         self.LibraryClass = Name
         self.SupModList = SupModList
-        if Type != None:
+        if Type is not None:
             self.SupModList = CleanString(Type).split(DataType.TAB_SPACE_SPLIT)
 
 ## ModuleBuildClassObject