Bump libdrm dependency to 2.4.95

96bef051 "drm-backend: add support for writeback connectors" started using DRM_MODE_CONNECTOR_WRITEBACK and DRM_CLIENT_CAP_WRITEBACK_CONNECTORS. These were introduced in libdrm 2.4.95.

According to !311 (merged) Ubunut Xenial is the only mentioned distribution that does not provide a libdrm new enough. I think that is fine to drop now, 2016 was a good while ago.

Libdrm 2.4.95 also introduced DRM_CLIENT_CAP_ASPECT_RATIO, DRM_MODE_PICTURE_ASPECT_64_27, DRM_MODE_PICTURE_ASPECT_256_135.

The fallback definitions for the above are dropped.

added Build system label

Right, so we're already failing compiles if we don't have >=.95 anyway. Seems reasonable to enforce it in the right place.

approved this merge request

added 5 commits

• 1cb1604a...7d2da94b - 4 commits from branch wayland:master
• 9b94a7d8 - Bump libdrm dependency to 2.4.95

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enabled an automatic merge when the pipeline for 9b94a7d8 succeeds

merged