* libecoff.h: New file. Defines ECOFF backend data for gdb.
* coff-mips.c: Now includes libecoff.h.
(ecoff_data_type): Moved to libecoff.h.
(ecoff_slurp_symbolic_info): Made globally visible so that gdb can
call it. If there is ever another ECOFF target, this and the
swapping functions should be accessed via an ECOFF specific target
vector.
Makefile.in (coff-mips.o): Depends on libecoff.h.