Update to dhcpcd-9.3.4 with the following changes:

Update to dhcpcd-9.3.4 with the following changes:

 * DHCP: If error adding the address in oneshot, exit with failure
 * DHCP: Only listen to the address if we successfully added it
 * DHCP6: Fix segfault introduced in dhcpcd-9.3.3
 * DHCP6: Abort in test mode when an error is returned by server
 * options: allow --ia_na=1 and --ia_pd=2 on the command line
 * options: Allow duid to take a value