ports 386 flavour

[Andy Whitcroft]

We seem to have lost the i386 '386' flavour in the recent merge of the
ports kernel into the main distro kernel.  There seems to be neither a
flavour nor a kernel configuration for it.

With the changes I did to fix the ports FTBFS created a new configuration
hieracy for the ports, but its not at all clear how one would inject the
386 kernel into that as we determine which hiearachy to use based on the
build architecture.

At a minimum we need to get the flavour resurected.  We will also need
to decide how we handle the configs.

-apw