Deprecate std::os::haiku::raw

Author: bstrie

library/std/src/os/haiku/raw.rs

@@ -1,6 +1,13 @@
 //! Haiku-specific raw type definitions
 
 #![stable(feature = "raw_ext", since = "1.1.0")]
+#![rustc_deprecated(
+    since = "1.53.0",
+    reason = "these type aliases are no longer supported by \
+              the standard library, the `libc` crate on \
+              crates.io should be used instead for the correct \
+              definitions"
+)]
 #![allow(deprecated)]
 
 use crate::os::raw::c_long;