The source project of this merge request has been removed.
mesa-buildtest: fix detection of gallium drivers
This removes an invalid check at the start of this test. osmesa/meson.build was used to determine if the mesa source had meson support. osmesa was removed from Mesa some time ago... Mesa supports meson now so a working version of this check is no longer necessary.
This also fixes the gallium driver detection stuff, somewhere the meson python api changed and referencing keys by name no longer works in the OptionInterpreter.