licenses: Add Avago Technologies (Avago) License Agreement

Source:
1. Make sure you are using incognito mode of your browser because the
   license will only be shown once.

2. Go to Avago Tech website [1] and search for "storcli".

3. Expand "Management Software and Tools" and click download button.

[1] http://www.avagotech.com/support/download-search?dnd-keyword=storcli