[OA-syst-ref] Posted OpenAMP System Reference presentation from HPP call to website

Hi,

I finally got around to one of my old action items. The PDF version of the presentation that Tomas & Bill gave to the HPP working group about OpenAMP System Reference is now posted to https://www.openampproject.org/docs/presentations/OpenAMPSystemReferenceProj...

Updates compared to what was actually presented to HPP:

* Added mention of RTOS * Updated Wind River logo

Best regards, Nathalie