bus interface.
* serial.c (serial_open): Notice device "pc".
* remote-e7000.c: Fix copyright date.
(expect): Compare \n and \r the same.
(e7000_open): Allow pc as a serial port
* sh/sh.mt: Add ser-e7kpc.
* h8300/h8300hms.mt: Add ser-e7kpc.
* main.c (proc_wait): Don't wait if using go32.
