update embedding interfaces mod.rs generator script to add MPL

also use better zsh syntax

ports/cef/regen_interface_mod_rs.sh

@@ -1,7 +1,19 @@
 #!/bin/zsh
 
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+
+setopt extended_glob
+echo -e $(cat << END_MPL
+/* This Source Code Form is subject to the terms of the Mozilla Public\n
+ * License, v. 2.0. If a copy of the MPL was not distributed with this\n
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */\n
+END_MPL) >>| interfaces_mod.rs
+
 # loop all files in interfaces dir
-for x in interfaces/^*mod.rs
+for x in $(print interfaces/*.rs~interfaces/mod.rs)
 do
     # open the use statement
     echo -n "pub use interfaces::$(basename $x .rs)::{" >>| interfaces_mod.rs
@@ -26,7 +38,7 @@ grep -E '^pub struct Cef' types.rs|sed 's/pub struct \([^ ]*\) .*/pub use types:
 # newline separators
 echo -e '\n\n' >>| interfaces_mod.rs
 # loop all files in interfaces dir again
-for x in interfaces/^*mod.rs
+for x in $(print interfaces/*.rs~interfaces/mod.rs)
 do
     # add mod statements for all interfaces
     echo "pub mod $(basename $x .rs);" >>| interfaces_mod.rs