[nrf noup] cmake: multiimage: zephyr_library_amend feature

This commits adds ${IMAGE} in order to support multiimage in the amend
feature.

Signed-off-by: Torsten Rasmussen <[email protected]>

Author: tejlmand

cmake/extensions.cmake

@@ -441,7 +441,7 @@ macro(zephyr_library_amend)
 
   zephyr_library_get_current_dir_lib_name(${ZEPHYR_CURRENT_MODULE_DIR} lib_name)
 
-  set(ZEPHYR_CURRENT_LIBRARY ${lib_name})
+  set(ZEPHYR_CURRENT_LIBRARY ${IMAGE}${lib_name})
 endmacro()
 
 function(zephyr_link_interface interface)