Gstreamer vaapi not installed on intel platforms

[fnoop]

From #640, minnowboard/up boards etc - basically all intel boards should install vaapi support.

[fnoop]

Refactored manifests to support intel platforms generically, added OpenCL gpu (beignet) and VAAPI support. 01org/gfx updated driver support only for Ubuntu.
@cglusky this should enable support for minnowboard and for up squared.

[cglusky]

fantastic! will fire them up in the next few days to test and report back.

[cglusky]

NO luck with vaapi on Up^2. Assuming it's not related to Beignet compile fail. Or it could be me. I am testing by adding this to conf

# Encoder, if not specified will default to h264.  Values are h264, mjpeg or none
encoder = vaapih264enc

Yields this in log...
2017-12-02 23:58:43,755 - CRITICAL - Stream starting with unrecognised encoder: vaapih264enc

Will have MinnowBoard back up in a few days and try on Ubuntu.

[fnoop]

vaapi is not an encoder type in visiond - that's h264. If vaapi is present in gstreamer it will (should) automatically find it and use it (and you'll see a note in the log). Change the encode back to h264, or just leave it blank.

[fnoop]

Test if vaapis is installed with:
gst-inspect-1.0 |grep vaapi