[azure-iot-sdk-c] Fixed the CMake config export.

[seanyen]

The azure-iot-sdk-c port seems not to be really usable by using CMake config files.

When one tries to consume the library by the following block:

find_package(azure_iot_sdks CONFIG REQUIRED)
# Note: 7 target(s) were omitted.
target_link_libraries(main PRIVATE serializer iothub_client prov_auth_client digitaltwin_client)

Soon one will see this error when running CMake:

CMake Error: The following variables are used in this project, but they are set to NOTFOUND.
Please set them or make sure they are set and tested correctly in the CMake files:
IOTHUB_CLIENT_INCLUDES

From my end, the problem is that iothub_client target is not exported from its CMake configs, but only ${provisioning_libs} get exported.

This patch is attempting to correct this behavior.

[seanyen]

cc @ewertons

[NancyLi1013]

include(vcpkg_common_functions) is no longer needed.
Could you please remove it?

[NancyLi1013]

Could you please update
configure_file(${SOURCE_PATH}/LICENSE ${CURRENT_PACKAGES_DIR}/share/azure-iot-sdk-c/copyright COPYONLY)
as
configure_file(${SOURCE_PATH}/LICENSE ${CURRENT_PACKAGES_DIR}/share/${PORT}/copyright COPYONLY)?

[seanyen]

@NancyLi1013 Thanks for the feedback. I updated the recipe accordingly.

@ewertons Let me know if my patch makes sense or not. Hope the patch can be folded back to the upstream.

[NancyLi1013]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[NancyLi1013]

include(vcpkg_common_functions) is no longer needed.
Could you please remove this line?
Sorry, I didn't notice this before.

[ras0219-msft]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[seanyen]

include(vcpkg_common_functions) is no longer needed.
Could you please remove this line?
Sorry, I didn't notice this before.

@NancyLi1013 updated. Thanks for the feedback.

[NancyLi1013]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[JackBoosY]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[NancyLi1013]

All features have passed on the following triplets:

• x86-windows
• x64-windows
• x64-windows-static

[strega-nil]

Cool, thanks @seanyen :D