Make loader output a bit more user-friendly.
* util/grub.d/10_hurd.in: Print message indicating that GNU Mach
is being loaded. Likewise for the Hurd.
* util/grub.d/10_kfreebsd.in (kfreebsd_entry): Print message indicating
that kernel of FreeBSD ${version} is being loaded.
* loader/i386/linux.c (grub_cmd_linux): Move debug info to
grub_dprintf().
(grub_cmd_initrd): Likewise.
* util/grub.d/10_linux.in (linux_entry): Print message indicating
that Linux ${version} is being loaded. Likewise for initrd.