Basic Install document: Add first openSUSE information

This patch set adds information about openSUSE. I used os="opensuse" for
it. The document as is will not build for opensuse since additional
files need to be changes first. I will add those additional changes once
this review is done.

Change-Id: Ib6bdaf206816c250ec216d878ec1bdc5620f9f64
Merge "Basic Install document: Add first openSUSE information"