Skip the entire Process.clock_getres spec on FreeBSD
Skip the entire Process.clock_getres spec on FreeBSD

* Clocks don't match the reported precision.
* https://rubyci.org/logs/rubyci.s3.amazonaws.com/freebsd11zfs/ruby-trunk/log/20190428T093003Z.fail.html.gz

nobu/rubyspec,eregon/rubyspec,eregon/rubyspec,eregon/rubyspec,nobu/rubyspec,nobu/rubyspec,ruby/spec,ruby/spec,ruby/spec