18hostname should be before 15autologin

[Michael Filippov]

Binary package hint: casper

casper_1.265 (Ubuntu 11.04) calls 15autologin with "chroot /root sudo ..." before /root/etc/hosts is initialized in 18hostname, and it causes this error (see boot.log and casper.log):
"Begin: Setting up automatic login... ... sudo: unable to resolve host (none)
done."

Possible fix: I renamed 18hostname -> 09hostname to initialize /root/etc/hosts before scripts which may need it and now it boots w/out warnings:
"Begin: Setting up automatic login... ... done."

[Stéphane Graber (stgraber)]

sudo is only called in 25adduser and 19keyboard nowadays, so hostname is at the right place in the stack.