Disable ISC DHCP client

The client is pretty useless without a working dhclient-script. The
udhcpc client provided by busybox works just fine.
Enable ntpdate package
Add pingpong package

The pingpong tool is used to measure TSC cycles for a trap-and-emulate
round-trip.
Enable pingpong package
Set Target Architecture to x86_64
Do not put a getty on the serial port
Add network interfaces configuration
Add script for continuous integration testing
Let ttysnoop spawn integration test script
Call ethtool for eth0 in integtest script
Set eth0 address to 192.168.254.100
Add Kontron-specific integration test script

This script performs the following actions:
- Output dmesg to serial
- Configure eth1 and ping integration server
- Call common integration test script
Let ttysnoop spawn integtest_kt script