By deduplicating libXvMC*.so and {r600,radionsi}_drv_video.so, this reduces the size of the drivers output from 63.3 MiB to 49.8 MiB.
1a52fdc
Fixes #17559. Using *relative* symlinks doesn't break when moving the files.
This reduces the size of the drivers output from 193 MiB to 44 MiB. @vcunat