Modifying comment character on SVR4 gas target

[John Levon <levon at movementarian dot org>]

I'd like to add an option similar to m68k's --bitwise-or to change the
comment character. It's easy enough to add a tc_comment_chars and
--divide option to remove '/' from comment_chars, but since GCC still
generates comment lines beginning with e.g. "/APP", it looks like I need
to add '/' to line_comment_chars when given the option, and introduce a
tc_line_comment_chars.

Does this seem like a reasonable approach, or would people prefer
something else?

thanks,
john