(utf-16-le-decode-loop)

(utf-16-le-decode-loop)
(utf-16-be-decode-loop): New temporary variables.
(ccl-decode-mule-utf-16-le): Use utf-16-le-decode-loop.
(ccl-decode-mule-utf-16-be): Use utf-16-be-decode-loop
(ccl-decode-mule-utf-16-le-with-signature)
(ccl-decode-mule-utf-16-be-with-signature)
(ccl-decode-mule-utf-16): New CCL programs.
(utf-16-le-encode-loop, utf-16-be-encode-loop): New temporary
variables.
(ccl-encode-mule-utf-16-le): Use utf-16-le-encode-loop.
(ccl-encode-mule-utf-16-be): Use utf-16-be-encode-loop
(ccl-encode-mule-utf-16-le-with-signature)
(ccl-encode-mule-utf-16-be-with-signature): New CCL programs.
(mule-utf-16-post-read-conversion): New function.
(mule-utf-16-le-with-signature, mule-utf-16-be-with-signature),
(mule-utf-16): New coding systems.
(utf-16-le-with-signature, utf-16-be-with-signature),
(utf-16): Aliases of the above coding systems.