Adding rootdelay and quiet parameter (again)

Rootdelay is required to boot from USB-Stick. Otherwise the rootfs was found to late.
quit will also boot up faster

SVN-Revision: 10522

target/linux/olpc/image/olpc.fth

@@ -1,4 +1,4 @@
 \ Boot script
 " u:\boot\vmlinuz" to boot-device
-" block2mtd.block2mtd=/dev/sda2,65536,rootfs root=/dev/mtdblock1 rootfstype=squashfs init=/etc/preinit noinitrd console=tty0" to boot-file
+" block2mtd.block2mtd=/dev/sda2,65536,rootfs root=/dev/mtdblock1 rootfstype=squashfs init=/etc/preinit noinitrd console=tty0 rootdelay=5 quiet" to boot-file
 boot