x11-drivers/xf86-video-tdfx: Update to 1.5.0

Update x11-drivers/xf86-video-tdfx to 1.5.0
Add USES=gl, LICENSE, LICENSE_FILE.

This is a maintenance releas.

Changelog:
https://lists.x.org/archives/xorg-announce/2019-February/002944.html

Sponsored by: B3 Init