Don't use --noudevsync as it causes the error on Debian jessie

[mkhon]

(kernel 3.16.0-4-amd64, dmsetup 2:1.02.90-2.2+d):

Aug 18 15:01:15 lab-hn2 kernel: [ 2166.255183] device-mapper: table: 253:1: linear: dm-linear: Device lookup failed Aug 18 15:01:15 lab-hn2 kernel: [ 2166.255250] device-mapper: ioctl: error adding target to table

Apparently rozeros device can not be found.

Fixes #8 for me