libc: Add FreeBSD system and libc headers from 14.2.0.

osreldate.h and sys/param.h were manually adjusted to not __FreeBSD_version
since it will be defined by the compiler.
6e64bc845fAlex Rønne Petersen committed on 5/10/2025, 10:19:26 AMparentdf719f2
64 files changedLine totals unavailable