* coff-h8300.c (howto_table): Update names to match recent

    * coff-h8300.c (howto_table): Update names to match recent
        changes to include/coff/internal.h.  Fix minor errors in the
        existing relocs.  Add R_MOVL1 and R_MOVL2.
        (rtype2howto): Similarly.
        (h8300_reloc16_estimate): Rewrite to simplify, fix bugs in the
        existing relaxing code  and peform more relaxing.
        (h8300_reloc16_extra_cases): Likewise.
Simplify, cleanup, fix bugs and improve existing relaxing code.

Add code for changing a 24/32bit absolute address into a 16bit absolute
address.

HMSE.