eg.
https://buildbot.libretro.com/nightly/nintendo/
RetroArch Nintendo forum: http://libretro.com/forums/forumdisplay.php?f=18
and
https://buildbot.libretro.com/nightly/nintendo/3ds/
Feedback thread: http://libretro.com/forums/showthread.php?t=3950/
These are just two examples.
I looked in github but couldn’t see the files/generator for the buildbot website.