BaseTools: Fixed bugs in CopyDict function

https://bugzilla.tianocore.org/show_bug.cgi?id=1387

This patch is going to fix the regression issue which is
introduced by commit bf9e636605.

This patch Remove the CopyDict incorrect usage for non-dict
input data. Add a check for CopyDict input.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Bob Feng <bob.c.feng@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Leif Lindholm <leif.lindholm@linaro.org>
Reviewed-by: Liming Gao <liming.gao@intel.com>

BaseTools/Source/Python/Common/Misc.py

@@ -2139,6 +2139,8 @@ def PackByteFormatGUID(Guid):
 #
 def CopyDict(ori_dict):
     dict_type = ori_dict.__class__
+    if dict_type not in (dict,OrderedDict):
+        return ori_dict
     new_dict = dict_type()
     for key in ori_dict:
         if isinstance(ori_dict[key],(dict,OrderedDict)):