add hermit to the list of omit OS

Author: stlankes

library/std/src/sys/mod.rs

@@ -89,6 +89,7 @@ cfg_if::cfg_if! {
         #[stable(feature = "rust1", since = "1.0.0")]
         pub use self::ext as windows_ext;
     } else if #[cfg(any(target_os = "cloudabi",
+                        target_os = "hermit",
                         target_arch = "wasm32",
                         all(target_vendor = "fortanix", target_env = "sgx")))] {
         // On CloudABI and wasm right now the shim below doesn't compile, so