graphics/mesa-libs build broken

From: Sergey V. Dyatko <sergey.dyatko_at_gmail.com>
Date: Thu, 25 Jan 2024 11:59:33 UTC
Hi,

After 2080c2eddaca4fa188668ae9fe8d76e0461378c3 I'm unable to build
graphics/mesa-libs  because host I'm using doesn't support kcmp(2), it is
FreeBSD 15.0-CURRENT #24 main-n265517-37236ab7e4e8-dirty
It seems that _supported_ X.Y-RELEASE doens't have it too and we
should have if in Makefile.common. Isn't it?

--
wbr, Sergey