pkg/rootless: use catatonit from /usr/libexec/podman

The path was missing a slash between the libexec path and the binary
name. This was never noticed because the code already falls back to a
builtt-in pause process.

Fixes: 71f96c2e6f ("rootless: define LIBEXECPODMAN")

Signed-off-by: Paul Holzinger <pholzing@redhat.com>

pkg/rootless/rootless_linux.c

@@ -278,7 +278,7 @@ do_pause ()
     sigaction (sig[i], &act, NULL);
 
   /* Attempt to execv catatonit to keep the pause process alive.  */
-  execl (LIBEXECPODMAN "catatonit", "catatonit", "-P", NULL);
+  execl (LIBEXECPODMAN "/catatonit", "catatonit", "-P", NULL);
   execl ("/usr/bin/catatonit", "catatonit", "-P", NULL);
   /* and if the catatonit executable could not be found, fallback here... */