ranlib bugs

[utzoo!henry]

The distributed ranlib(1) complains about library members that look
like object modules but have a 0-length symbol table.  There is one
circumstance where a 0-length symbol table is legitimate:  in the
presence of #ifdef's and the like, it is entirely possible to have
a null object module (no text, no data, no bss, no symbol table).
To fix ranlib not to complain about such things, change the fprintf
complaining about "no name list" in about line 60 to:

	if (exp.a_text!=0 || exp.a_data!=0 || exp.a_bss!=0)
		fprintf...

This should be a straight substitution, with the surrounding if and
continue left unchanged.

Also, two of ranlib's error messages identify it as "nm";  the fix is
"g/nm:/s//ranlib:/p".