MdeLibs.dsc.inc included some default libraries provided by MdePkg.
Platform can include MdeLibs.dsc.inc file to avoid some potential
incompatible changes to platform dsc file in future.

Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Zhiguang Liu <zhiguang.liu@intel.com>
Cc: Jiaxin Wu <jiaxin.wu@intel.com>
Cc: Yuanhao Xie <yuanhao.xie@intel.com>
Signed-off-by: Hongbin1 Zhang <hongbin1.zhang@intel.com>
Reviewed-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Jiaxin Wu <jiaxin.wu@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Reviewed-by: Zhiguang Liu <zhiguang.liu@intel.com>