COFF changes for dealing better with EPI 29K C compiler output.

COFF changes for dealing better with EPI 29K C compiler output.

* coffread.c (record_minimal_symbol):  Pass the minsym type to it.
Callers changed.
(coff_end_symtab):  Sort blocks if needed.  Complain if misordered.
(read_coff_symtab):  Move patch_opaque_types call from
coff_symfile_read.  Restrict it to symtabs from this objfile.
(process_coff_symbol: C_TPDEF):  Don't put ordinary foward
references on opaque type chain; just let coff_lookup_type handle 'em.
(decode_type):  Complain about tagndx values on
non-struct/union/enum types, which the EPI compiler tends to produce.

* symtab.c (list_symbols):  Make minimal symbol variable-finding work.

* tm-68k.h (FIX_CALL_DUMMY): Avoid alignment and byte order
dependency.

* elfread.c (elf_symfile_read):  Update bfd_elf_find_section
usage to match new prototype.  Include libbfd.h to get prototype.