removing dependancy on COMPAT_43 from linuxator

Hi

I wrote a patch which removes dependancy on COMPAT_43 from linux abi simulator.
It introduces new option COMPAT_43FORLIN (name should be changed), ie. it
peels of the kernel all the unecessary stuff noone these days use while keeping
linux emulation working...

its kern/73165, pls take a look

roman