linux-libre tools 'traceevent'

[bill-auger]

prior to v6.x, did linux-libre treat anything under the
tools/lib/traceevent directory? - it is no longer present in
linux-libre 6.x - linux seems to have moved it to another repo,
with it's own versioning (currently 1.7.2)
https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/

it is fairly important now though, required transitively by
programs such as QEMU (i had to remove QEMU, all of GNOME, and
KDE to be rid of it) - do we know already if it is libre? - it
seems to have a sibling named 'tracefs', which is in the same
dependency chain - i dont think linux-libre ever handled that one
https://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git/