* remote.c (struct packet_reg): Add field in_g_packet.

* remote.c (struct packet_reg): Add field in_g_packet.
(struct remote_state): Rename field g_packet to regs;
(free_remote_state): Update.
(init_remote_state): Add pseudo-registers to table.  Initialize
in_g_packet.  Drop sentinal from table.
(packet_reg_from_regnum, packet_reg_from_pnum): Update.
(remote_fetch_registers): Handle registers not in the g-packet.
(remote_store_registers): Ditto.