Patches so remote GDB testing works.

	* dejagnu/baseboards/atmega128-studio.exp: Load gdb-extra.exp.
	* dejagnu/gdb-extra.exp (gdb_load): Use target_info rather than
	board_info, remote_send to host in all cases.
Script for tidying up.

	* tidy-up.sh: Script to remove old logs and compress old results
	directories.