make sure all shared libs depend on interp

Makerules

@@ -8,6 +8,7 @@
 ifeq ($(HAVE_SHARED),y)
 .LIBPATTERNS: "lib%.so"
 libs: $(lib-so-y) $(lib-a-y)
+$(lib-so-y): $(interp)
 else
 .LIBPATTERNS: "lib%.a"
 libs: $(lib-a-y)