add renaming-import test

t/renaming-import.scm

@@ -0,0 +1,11 @@
+(define-library (foo)
+  (import (except (rename (prefix (only (scheme base) car cdr cons) my-)
+                          (my-car my-kar)
+                          (my-cdr my-kdr))
+                  my-kar))
+
+  ;; (import (rename (scheme base)
+  ;;                 (car my-kar)
+  ;;                 (cdr my-cdr)))
+
+  (export my-kdr my-cons))