blog post on fio's CPU clock test

[Vincent Fu <vincentfu@xxxxxxxxx>]

I am pleased to share a blog post about a recently resolved issue with 
fio's CPU clock test:

https://github.com/vincentkfu/fio-blog/wiki/Clock-test-issue

This issue was triggered by a compiler change and exposes a difference 
in how AMD and Intel CPUs behave.

Take a look! Feedback is welcome.

Vincent