BaseTools:Similar to octal data rectification

In python3, if Value is octal data, the int(Value, 0) report an error

Cc: Bob Feng <bob.c.feng@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Yonghong Zhu <yonghong.zhu@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Zhiju.Fan <zhijux.fan@intel.com>
Tested-by: Laszlo Ersek <lersek@redhat.com>
Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Liming Gao <liming.gao@intel.com>
Reviewed-by: Bob Feng <bob.c.feng@intel.com>

BaseTools/Source/Python/AutoGen/GenC.py

@@ -1010,6 +1010,8 @@ def CreateModulePcdCode(Info, AutoGenC, AutoGenH, Pcd):
             try:
                 if Value.upper().endswith('L'):
                     Value = Value[:-1]
+                if Value.startswith('0') and not Value.lower().startswith('0x') and len(Value) > 2:
+                    Value = Value.lstrip('0')
                 ValueNumber = int (Value, 0)
             except:
                 EdkLogger.error("build", AUTOGEN_ERROR,