coff: Initial commit
coff: Implement optional header, symbols and sections.
coff: Small fixups and coff bin object free implementation.
coff: Try to detect coff. Only h8300 now.
Adds some fixes to support x86, amd64 and h8000 together.
coff: Use beginning of .text section if no entry point specified.
coff: Let's support TI coff and tms320 files.