Fix cfg attrs on SendMmsgData

Author: Gleb Pomykalov

src/sys/socket/mod.rs

@@ -792,7 +792,13 @@ pub fn sendmsg(fd: RawFd, iov: &[IoVec<&[u8]>], cmsgs: &[ControlMessage],
     Errno::result(ret).map(|r| r as usize)
 }
 
-#[cfg(any(target_os = "linux", target_os = "freebsd"))]
+#[cfg(any(
+    target_os = "linux",
+    target_os = "android",
+    target_os = "freebsd",
+    target_os = "openbsd",
+    target_os = "netbsd",
+))]
 #[derive(Debug)]
 pub struct SendMmsgData<'a, I, C>
     where