Fix #1200 (comment)

Author: alecmocatta

src/unix/bsd/netbsdlike/netbsd/mod.rs

@@ -988,8 +988,9 @@ pub const SOCK_CLOEXEC: ::c_int = 0x10000000;
 pub const SOCK_NONBLOCK: ::c_int = 0x20000000;
 
 pub const FIONCLEX: ::c_ulong = 0x20006602;
-pub const FIOSEEKDATA: ::c_ulong = 0xc0086661;
-pub const FIOSEEKHOLE: ::c_ulong = 0xc0086662;
+// Uncomment on next NetBSD release https://github.com/rust-lang/libc/pull/1200#issuecomment-453712616
+// pub const FIOSEEKDATA: ::c_ulong = 0xc0086661;
+// pub const FIOSEEKHOLE: ::c_ulong = 0xc0086662;
 pub const FIONREAD: ::c_ulong = 0x4004667f;
 pub const FIOASYNC: ::c_ulong = 0x8004667d;
 pub const FIOSETOWN: ::c_ulong = 0x8004667c;