Hello,

All multi-arch targets (yep, including the i386) allow the byte order to 
be selected at run time.  This means that the macro 
TARGET_BYTE_ORDER_SELECTABLE which was used by non-multi-arch targets is 
obsolete.

The attached patch eliminates that macro.  I've tested it on a 
multi-arch target and I don't think it breaks non-multi-arch targets.

Anyway, I intend committing this in a few days.
Andrew