Replace LP_CLONE_MXIO_ROOT with LP_CLONE_MXIO_NAMESPACE

LP_CLONE_MXIO_NAMESPACE is the new name for this flag.

Change-Id: I33d8e07cecf700643f2f5a555237bf8cb4faf117
diff --git a/fuchsia/fuchsia-compat.c b/fuchsia/fuchsia-compat.c
index f229b63..7da25e2 100644
--- a/fuchsia/fuchsia-compat.c
+++ b/fuchsia/fuchsia-compat.c
@@ -296,7 +296,7 @@
   launchpad_create(0, command, &lp);
   launchpad_load_from_file(lp, argv[0]);
   launchpad_set_args(lp, argc, argv);
-  launchpad_clone(lp, LP_CLONE_MXIO_ROOT | LP_CLONE_MXIO_CWD);
+  launchpad_clone(lp, LP_CLONE_MXIO_NAMESPACE | LP_CLONE_MXIO_CWD);
   // TODO: set up environment
   if (in == out) {
     launchpad_clone_fd(lp, in, STDIN_FILENO);