It seems that hwids was not update for a half of a year even on github. It has no information about new hardware, e.g. Logitech MX Master. I think that we should use files from systemd if it was installed.
commit 71143327e754a50320670307461a072193e79218 Author: Mike Gilbert <floppym@gentoo.org> Date: Sun Mar 6 10:00:17 2016 -0500 sys-apps/hwids: Bump to 20160306 Bug: https://bugs.gentoo.org/576568 Package-Manager: portage-2.2.27_p64 sys-apps/hwids/Manifest | 1 + sys-apps/hwids/{hwids-99999999.ebuild => hwids-20160306.ebuild} | 2 +- sys-apps/hwids/hwids-99999999.ebuild | 2 +- 3 files changed, 3 insertions(+), 2 deletions(-)