Introduce \newdwfnamecommands command that defines multiple

Introduce \newdwfnamecommands command that defines multiple
commands based corresponding to DWARF symbolic names. Make
the most common case, eg, \DWATname, be the form that results
in both an index entry and a live link (that is, reverse the
LL suffix convention introduced in the previous submision.

Signed-off-by: Ron Brender <ron.brender@gmail.com>