sandbox: fix the rules

1. `script` (used to fake the tty) requires write access to /dev/ptmx
and /dev/ttys*
2. sandbox profile only accepts `[0-9]` instead of `\d`.

Library/Homebrew/sandbox.rb

@@ -110,10 +110,11 @@ class Sandbox
       (debug deny) ; log all denied operations to /var/log/system.log
       <%= rules.join("\n") %>
       (allow file-write*
+          (literal "/dev/ptmx")
           (literal "/dev/dtracehelper")
           (literal "/dev/null")
-          (regex #"^/dev/fd/\\d+$")
-          (regex #"^/dev/tty\\d*$")
+          (regex #"^/dev/fd/[0-9]+$")
+          (regex #"^/dev/ttys?[0-9]*$")
           )
       (deny file-write*) ; deny non-whitelist file write operations
       (allow default) ; allow everything else