We seem to be hitting occasional failures to DHCP in time, although
DHCP itself seems working. Try increasing timeout from 30 to 60.
Also enable tracing when building the image, so that this sort of
issues is a bit easier to debug without unpacking the image.
Change-Id: If3f00ba39daf72739802c46c5c6c64cfbb6ab0ae
de85baaa95