Track backtraces for INTERFACE_LINK_LIBRARIES
We already keep backtraces for LINK_LIBRARIES, so error messages involving its link items have backtraces. Track backtraces for INTERFACE_LINK_LIBRARIES too so we can produce better error messages.
We already keep backtraces for LINK_LIBRARIES, so error messages involving its link items have backtraces. Track backtraces for INTERFACE_LINK_LIBRARIES too so we can produce better error messages.