Fix build on -head (OSVERSION >= 1200031)
Ino is still uint32 for all versions of FreeBSD.
Reference: https://golang.org/src/syscall/ztypes_freebsd_386.go
https://golang.org/src/syscall/ztypes_freebsd_amd64.go https://golang.org/src/syscall/ztypes_freebsd_arm.go