[PATCH] auxv support

[Andrew Cagney]

> 
> Seems reasonable.  Probably the packet will need to be conditionally
> supported (see packet_ok, remote_P_packet or so).  The mechanism for
> doing that at the moment involves a couple of copy/pastes, it needs
> cleaning up eventually.
> 
Daniel, remember, proposals to either change or extend the protocol 
first need to be discussed on gdb@.

Roland, for the remote changes, can you start a new thread on gdb@ 
describing what you're thinking (since it needs doco changes, people 
often present it as a diff to gdb/doc/gdb.texinfo)?

Andrew