Fix memleaks in cli_classic.c

Frees the memory allocated for the following strings
- log file name
- layout file name
- image file name
- programmer parameter (and reset the associated global variable in flashrom.c)

Also, free the flashchip structs allocated by probe_flash.

The layout image names were not fixed due to the pending layout patches.

These bugs were found thanks to valgrind.

Corresponding to flashrom svn r1629.

Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
Acked-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>

flashrom.c

@@ -351,6 +351,7 @@ int programmer_shutdown(void)
 		int i = --shutdown_fn_count;
 		ret |= shutdown_fn[i].func(shutdown_fn[i].data);
 	}
+	programmer_param = NULL;
 	return ret;
 }