Make PlaceRef lifetimes of move_path_for_place be both 'tcx

Author: spastorino

src/librustc_mir/borrow_check/mod.rs

@@ -1723,7 +1723,7 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
         }
     }
 
-    fn move_path_for_place(&mut self, place: PlaceRef<'_, 'tcx>) -> Option<MovePathIndex> {
+    fn move_path_for_place(&mut self, place: PlaceRef<'tcx, 'tcx>) -> Option<MovePathIndex> {
         // If returns None, then there is no move path corresponding
         // to a direct owner of `place` (which means there is nothing
         // that borrowck tracks for its analysis).