`libvdpau-va-gl` is a wrapper around VAAPI to have a VDPAU driver, which
is required for Intel GPU's. `VDPAU_DRIVER` environment variable is set
to "va_gl", since it defaults to "nvidia".
I've tested this to work on MacBookAir4,1 and I'm going to deploy it
to MacBookAir6,2 today and Lenovo ThinkPad X230 in a week from now.
Also, cleaned up Lenovo ThinkPad X230 profile.