fix(sys/hermit): add is_interrupted

Signed-off-by: Martin Kröning <martin.kroening@eonerc.rwth-aachen.de>

library/std/src/sys/hermit/mod.rs

@@ -130,6 +130,11 @@ pub unsafe extern "C" fn runtime_entry(
     abi::exit(result);
 }
 
+#[inline]
+pub(crate) fn is_interrupted(errno: i32) -> bool {
+    errno == abi::errno::EINTR
+}
+
 pub fn decode_error_kind(errno: i32) -> ErrorKind {
     match errno {
         abi::errno::EACCES => ErrorKind::PermissionDenied,