Partx was moved out of the main util-linux and into a subpackage
therefore cloud-utils-growpart's dependency for util-linux needs
to be changed to partx instead.
Also remove cloud-utils-growpart dependency on coreutils and add
patch growpart to use a flock command-line option that is understood
by both util-linux and bosybox's flock command.
In upstream 0.32 a call to "udevadm settle" was added to growpart. Add
a patch to growpart to make this call optional and remove eudev from
cloud-utils-growpart package dependencies so that growpart can be used
on non-udev systems.