RFC: coffread.c relocation fixes

[Michael Elizabeth Chastain]

> I don't have much comments on the test (except that the convention is
> to use '-' instead of '_' in file names, and that you need to update
> the gdb/config/djgpp/fnchange.lst file). I wonder if instead of 'while 1'
> you could use exp_continue. MichaelC?

Dunno.

(I am on hiatus again, in case anyone hasn't noticed.  I will be
back eventually).

Michael C