Change hw6 to an unsolved version.

Signed-off-by: jmug <u.g.a.mariano@gmail.com>

hw6/lib/util/platform.ml

@@ -65,7 +65,7 @@ let configure_os () =
   then (
     linux := true ;
     target_triple := linux_target_triple ;
-    platform_flags := "-Wa,--noexecstack" )
+    platform_flags := "" )
   else if os = "Darwin"
   then (
     linux := false ;