ors in building lang/ruby 18 on CURENT-10.0-i386

[Steve Wills]

> Make config with oniguruma enabled and disabled has had the following
> error:
>
> ./lib/fileutils.rb:85: [BUG] Segmentation fault
> ruby 1.8.7 (2012-10-12 patchlevel 371) [i386-freebsd10]
>

This is an incompatibility between Ruby 1.8 and Clang, I think. Anyway,
Ruby 1.8 is ancient. Use 1.9:

echo "RUBY_DEFAULT_VER=1.9" >> /etc/make.conf

Steve