Fill in def_span when creating def ids.

This makes sure that ICEing because of def ids created outside of ast lowering will be able to produce a query backtrace and not cause a double panic because of trying to call the  `def_span` query

compiler/rustc_middle/src/query/mod.rs

@@ -1109,6 +1109,7 @@ rustc_queries! {
         desc { |tcx| "looking up span for `{}`", tcx.def_path_str(def_id) }
         cache_on_disk_if { def_id.is_local() }
         separate_provide_extern
+        feedable
     }
 
     /// Gets the span for the identifier of the definition.