[boost] Deprecation of detail endian macros.

Subject: [boost] Deprecation of detail endian macros.
From: Rene Rivera (grafikrobot_at_[hidden])
Date: 2018-09-03 21:01:56

This is a general announcement that I'm deprecating the following that is
part of Predef:

Header: boost/detail/endian.hpp
Macros: BOOST_BIG_ENDIAN, BOOST_LITTLE_ENDIAN, BOOST_PDP_ENDIAN,
and BOOST_BYTE_ORDER

You can use the equivalents from Predef <
https://www.boost.org/doc/libs/1_68_0/doc/html/predef/reference.html#predef.reference.other_macros.boost_endian>
as follow:

BOOST_BIG_ENDIAN == BOOST_ENDIAN_BIG_BYTE
BOOST_LITTLE_ENDIAN == BOOST_ENDIAN_LITTLE_BYTE
BOOST_PDP_ENDIAN == BOOST_ENDIAN_LITTLE_WORD

There is no equivalent for BOOST_BYTE_ORDER. But there are no uses in Boost
as far as I could tell.

In the develop branch of Predef I've added a deprecation message indicating
as such.

-- 
-- Rene Rivera
-- Grafik - Don't Assume Anything
-- Robot Dreams - http://robot-dreams.net