start first partition at 1M not 0

trying to create a partition with parted at actually 0 offset
causes a warning on alignment. On a real disk this would be an
actual issue with offsets, and could have a real performance
impact. With a virtual disk, it's a little less clear, but can't
hurt to shave off 1M of swap to align in a more typical way.

Change-Id: I28cb60c635280603488a9b34ead848ee76ca111c

functions.sh

@@ -125,7 +125,7 @@ function fix_disk_layout {
         if [ -n "$DEV" ]; then
             sudo umount ${DEV}
             sudo parted ${DEV} --script -- mklabel msdos
-            sudo parted ${DEV} --script -- mkpart primary linux-swap 0 8192
+            sudo parted ${DEV} --script -- mkpart primary linux-swap 1 8192
             sudo parted ${DEV} --script -- mkpart primary ext2 8192 -1
             sudo mkswap ${DEV}1
             sudo mkfs.ext4 ${DEV}2