[tests] install bin/test.sh as frama-c-test.sh

bin/dune

@@ -26,6 +26,7 @@
  (files
   (frama-c-script as frama-c-script)
   (frama-c-config as frama-c-config)
+  (test.sh as frama-c-test.sh)
   (local_export.sh as local_export.sh)
  )
 )