Fixes to discover.ml: calling the linker with compiler flags is bad and causes failures under Windows.
Fixes to discover.ml: calling the linker with compiler flags is bad and causes
failures under Windows.

rgrinberg/lwt,fdopen/lwt,mfp/lwt,fdopen/lwt,rgrinberg/lwt,rneswold/lwt,rgrinberg/lwt,rgrinberg/lwt,mirage/lwt,rneswold/lwt,c-cube/lwt,mfp/lwt,mirage/lwt,c-cube/lwt,c-cube/lwt,ocsigen/lwt,ocsigen/lwt,rneswold/lwt,ocsigen/lwt