download libspdm code and its submodules twice

[lbbxsxlz]

When use "git submodule update --init --recursive" command to get the full repo, the libspdm code and its submodules will download twice.

The files in SPDM-Responder-Validator/libspdm directory are not necessary to build the spdm-emu executable files.

[jyao1]

9/19/2022 - The solution is to move https://github.com/DMTF/spdm-emu/tree/main/spdm_emu/spdm_device_validator_sample to https://github.com/DMTF/SPDM-Responder-Validator

[Wenxing-hou]

9/19/2022 - The solution is to move https://github.com/DMTF/spdm-emu/tree/main/spdm_emu/spdm_device_validator_sample to https://github.com/DMTF/SPDM-Responder-Validator

Hi. When move spdm_emu/spdm_device_validator_sample to DMTF/SPDM-Responder-Validator, there are many code depend on spdm-emu.

spdm-emu/spdm_emu/spdm_device_attester_sample/CMakeLists.txt

Lines 18 to 23 in 32bdd5e

	${PROJECT_SOURCE_DIR}/spdm_emu/spdm_emu_common/spdm_emu.c
	${PROJECT_SOURCE_DIR}/spdm_emu/spdm_emu_common/command.c
	${PROJECT_SOURCE_DIR}/spdm_emu/spdm_emu_common/key.c
	${PROJECT_SOURCE_DIR}/spdm_emu/spdm_emu_common/nv_storage.c
	${PROJECT_SOURCE_DIR}/spdm_emu/spdm_emu_common/pcap.c
	${PROJECT_SOURCE_DIR}/spdm_emu/spdm_emu_common/support.c

spdm-emu/spdm_emu/spdm_device_attester_sample/spdm_device_attester_sample.h

Lines 12 to 17 in 32bdd5e

	#include "library/spdm_requester_lib.h"
	#include "library/spdm_transport_none_lib.h"
	#include "library/spdm_transport_mctp_lib.h"
	#include "library/spdm_transport_pcidoe_lib.h"
	#include "library/mctp_requester_lib.h"
	#include "library/pci_doe_requester_lib.h"

The independent DMTF/SPDM-Responder-Validator will not build successful without these code/lib support.

[jyao1]

Look at DMTF/SPDM-Responder-Validator#36.

It seems too many changes.

@steven-bellock , should we consider move below to libspdm ?

 #include "library/spdm_transport_mctp_lib.h" 
 #include "library/spdm_transport_pcidoe_lib.h" 
 #include "library/mctp_requester_lib.h" 
 #include "library/pci_doe_requester_lib.h" 

Still thinking what is the best way to organize those libraries. Let's discuss in the meeting.