This builds the dhcpcd package from a fixed Alpine 3.5 base and adds
the dhcpcd daemon from the Alpine base image. This should make the
build reproducible and allows us to use the git tree hash.
Signed-off-by: Rolf Neugebauer <rolf.neugebauer@docker.com>
It is not necessary to bring up `eth0`, the program does it fine.
This means we can remove shell script, clean up build.
Signed-off-by: Justin Cormack <justin.cormack@docker.com>
