Fix libvfs.so build

[Pavel Roskin]

Hi, Pavel!

> Libvfs.so was killed somehow during automakification. Okay to commit
> this?
>
> Index: Make-mc.in

I thought that Makefile.am was supposed to be used for standalone libvfs.
That's why I removed it from Make-mc.in.

Can you tell me then what vfs/Makefile.am is for? If even you are not
using it, why keep it?

Or maybe there is some reason to have non-standalone (i.e. devendent on
MC/GMC) shared libvfs.so?

-- 
Regards,
Pavel Roskin