Add more from the std

library/std/src/sys/net/hostname/unsupported.rs

@@ -1,6 +0,0 @@
-use crate::ffi::OsString;
-use crate::io::{Error, Result};
-
-pub fn hostname() -> Result<OsString> {
-    Err(Error::UNSUPPORTED_PLATFORM)
-}

library/std/src/sys/net/hostname/unsupported.rs

@@ -0,0 +1 @@
+/home/julien/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/sys/net/hostname/unsupported.rs