fix(update_chroot): Generate make.conf.host_setup before update scripts.

This doesn't currently have any real impact but seems like a better
ordering since update scripts may need to emerge things.

Add some friendly version info logging.
fix(common): sort -R is random, -r is reverse. Kids, use long options...

Randomly failing builds for fun and profit!
Merge pull request #82 from marineam/fix-cmp

Fix cmp