BaseTools:Updata the output encoding of the Popen function

BZ:https://bugzilla.tianocore.org/show_bug.cgi?id=2015

Not all output works in utf-8, so change the encoding to
the default

This patch is going to fix that issue.

Cc: Bob Feng <bob.c.feng@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Signed-off-by: Zhiju.Fan <zhijux.fan@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>

BaseTools/Source/Python/Common/Misc.py

@@ -1087,7 +1087,7 @@ def ParseFieldValue (Value):
             p.stderr.close()
         if err:
             raise BadExpression("DevicePath: %s" % str(err))
-        out = out.decode(encoding='utf-8', errors='ignore')
+        out = out.decode()
         Size = len(out.split())
         out = ','.join(out.split())
         return '{' + out + '}', Size