IntelFspPkg/GenCfgOpt tool add embed structure.

IntelFspPkg/GenCfgOpt tool add embed structure.

The EMBED command allows you to put one or more UPD data into a specify data structure.
 You can utilize it as a group of UPD for example.
 You must specify a start and an end for the specify data structure.
Example:
     !HDR EMBED:{MY_DATA_STRUCT:MyDataStructure:START}
     gTokenSpaceGuid.Upd1  | 0x0020 | 0x01 | 0x00
     gTokenSpaceGuid.Upd2  | 0x0021 | 0x01 | 0x00
     !HDR EMBED:{MY_DATA_STRUCT:MyDataStructure:END}
     gTokenSpaceGuid.UpdN  | 0x0022 | 0x01 | 0x00
Result:
                  typedef struct {
                  /** Offset 0x0020
                  **/
                  UINT8                     Upd1;
                  /** Offset 0x0021
                  **/
                  UINT8                     Upd2;
                  /** Offset 0x0022
                  **/
                  UINT8                     UpdN;
                  }  MY_DATA_STRUCT;

                  typedef struct _UPD_DATA_REGION {
                  …
                  /** Offset 0x0020
                  **/
                  MY_DATA_STRUCT    MyDataStruct;
                  …
                    } UPD_DATA_REGION;

Contributed-under: TianoCore Contribution Agreement 1.0

Signed-off-by: "Ma, Maurice" <maurice.ma@intel.com>
Reviewed-by: "Mudusuru, Giri P" <giri.p.mudusuru@intel.com>
Reviewed-by: "Rangarajan, Ravi P" <ravi.p.rangarajan@intel.com>
Reviewed-by: "Yao, Jiewen" <Jiewen.yao@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17549 6f19259b-4bc3-4df7-8a09-765794883524