Add configuration ExceptionList and IgnoreFiles for package config files. So users can rely on this to ignore some Ecc issues. Besides, add submodule path in IgnoreFiles section. Cc: Jian J Wang <jian.j.wang@intel.com> Cc: Xiaoyu Lu <xiaoyux.lu@intel.com> Signed-off-by: Shenglei Zhang <shenglei.zhang@intel.com> Reviewed-by: Liming Gao <liming.gao@intel.com> Reviewed-by: Guomin Jiang <guomin.jiang@intel.com>