RIOT-OS/RIOT — pull request #462 by OlegHahm (2013-12-20 15:45:41+00:00)
Title: check for __BIG_ENDIAN__ rather than for __BYTE_ORDER__ and include board.h

Most of the platforms are little endian. Since at least one version of the codesourcery toolchain defines __BYTE_ORDER__ wrong, it's safer to define this ourselves in board.h when necessary, i.e. on big endian platforms.