Patch: Use demangler list from libiberty

[Kenneth Block]

Could somebody apply this patch?

This patch will eliminate the redundant list of what demanglers are
supported from GDB, instead it will use the list that is available in
libiberty. The version in libiberty is more up to date and includes things
like the NEW G++ ABI demangler. This will also allow new demanglers to be
added without needing to update GDB.

Previously, this patch was rejected because I did not have an assignment on
file. I just got an email from RMS that he has received and accepted
assignments from me and a disclaimer from my employer.

http://sources.redhat.com/ml/gdb-patches/2000-06/msg00229.html