Log Message:
Update ruby-facter package to 1.6.8.

1.6.8
===
b86fe4c (#12831) Add rspec tests to have_which method in Resolution
70be957 (#12831) Fix recursion on first kernel fact resolution

1.6.7
===
ab9e26c Updating CHANGELOG and lib/facter.rb for Facter 1.6.7rc1
bdbf332 (#12720) Add Solaris CPU info to 'processorN' fact.
a7f5924 (#12813) Redirect lspci output to /dev/null
6ec2863 (#12669) Preserve timestamps when installing files