compat/bswap.h: detect endianness on more platforms that don't use BYTE_ORDER
compat/bswap.h: detect endianness on more platforms that don't use BYTE_ORDER

Signed-off-by: Charles Bailey <3f465f92b896a0cffa56d66f3cf7f14fc3025706@bloomberg.net>
Signed-off-by: Junio C Hamano <a6723cc3f76163bf7adb636a73ac3b0ceb3e6b9b@pobox.com>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git