Fix picobsd builds. Changes include:

• use proper make configuration for the build, using ${BINMAKE} as evaluated by ${VERSION}/src/Makefile
• remove -lmytinfo from crunch.conf
• remove support for login_access in tinyware/login
• remove "machine i386" from the kernel config file

It might actually be interesting to extend the script to do
a cross build for !i386 ...

MFC after: 3 days