Fix invalid CfgDataDef generation in multi-level includes

This issue happens when a template file includes another files
since template dictionary has '!include' line itself instead of
its contents.

Signed-off-by: Aiden Park <aiden.park@intel.com>

BootloaderCorePkg/Tools/GenCfgData.py

@@ -673,6 +673,9 @@ EndList
                         TemplateName = ''
                 else:
                     if TemplateName:
+                        Match = re.match("^!include\s*(.+)?$", DscLine)
+                        if Match:
+                            continue
                         self._BsfTempDict[TemplateName].append(DscLine)
 
             else: