Revert "testsuite: use -opaque in lib-dynlink-native to avoid new .cmx warning"
Revert "testsuite: use -opaque in lib-dynlink-native to avoid new .cmx warning"

The Makefile of testsuite is a bit too complex for its own good and
I should have thought deeper about what it meant that the test would
work from the "make tests" target, and not when run locally. My
previous commit fixed local runs and broke the "make tests" target. We
should fix this, but later.

This reverts commit e48fce72635a338cc217a453ef79e27ada06765a.

eliberis/ocaml,eliberis/ocaml,gerdstolpmann/ocaml,eliberis/ocaml,yunxing/ocaml,gerdstolpmann/ocaml,gerdstolpmann/ocaml,eliberis/ocaml,gerdstolpmann/ocaml,yunxing/ocaml,msprotz/ocaml,msprotz/ocaml,eliberis/ocaml,msprotz/ocaml,gerdstolpmann/ocaml,yunxing/ocaml,yunxing/ocaml,yunxing/ocaml,msprotz/ocaml,msprotz/ocaml