Castrate configure's checks for elf.h. Now that FreeBSD has an elf.h,
Vim thought we were SysV! (yea, right, only when they pry this keyboard
from my cold stiff dead hands!)
Vim 5.0 beta is still under development (hasn't really reached a final beta
stage). Until that point, I don't want to change the stable vim-4.6 port.
Note that Vim5.0 has syntax coloring and Perl 5.004 support.
