sysbuild: Add MCUboot update ID to application

This can be used by the application to know if MCUboot and b0 are
enabled, though the slot itself cannot be used from the application

Signed-off-by: Jamie McCrae <jamie.mccrae@nordicsemi.no>

Author: nordicjm

sysbuild/CMakeLists.txt

@@ -399,6 +399,7 @@ function(${SYSBUILD_CURRENT_MODULE_NAME}_pre_cmake)
       set_property(TARGET ${DEFAULT_IMAGE} APPEND_STRING PROPERTY CONFIG "CONFIG_MCUBOOT_NETWORK_CORE_IMAGE_NUMBER=${SB_CONFIG_MCUBOOT_NETWORK_CORE_IMAGE_NUMBER}\n")
       set_property(TARGET ${DEFAULT_IMAGE} APPEND_STRING PROPERTY CONFIG "CONFIG_MCUBOOT_WIFI_PATCHES_IMAGE_NUMBER=${SB_CONFIG_MCUBOOT_WIFI_PATCHES_IMAGE_NUMBER}\n")
       set_property(TARGET ${DEFAULT_IMAGE} APPEND_STRING PROPERTY CONFIG "CONFIG_MCUBOOT_QSPI_XIP_IMAGE_NUMBER=${SB_CONFIG_MCUBOOT_QSPI_XIP_IMAGE_NUMBER}\n")
+      set_property(TARGET ${DEFAULT_IMAGE} APPEND_STRING PROPERTY CONFIG "CONFIG_MCUBOOT_MCUBOOT_IMAGE_NUMBER=${SB_CONFIG_MCUBOOT_MCUBOOT_IMAGE_NUMBER}\n")
     endif()
 
     if(SB_CONFIG_MCUBOOT_HARDWARE_DOWNGRADE_PREVENTION)