Add __c_anonymous prefix to xsk_tx_metadata_*

Author: Marcondiro

src/unix/linux_like/linux/mod.rs

@@ -984,11 +984,11 @@ s! {
         pub options: crate::__u32,
     }
 
-    pub struct xsk_tx_metadata_completion {
+    pub struct __c_anonymous_xsk_tx_metadata_completion {
         pub tx_timestamp: crate::__u64,
     }
 
-    pub struct xsk_tx_metadata_request {
+    pub struct __c_anonymous_xsk_tx_metadata_request {
         pub csum_start: __u16,
         pub csum_offset: __u16,
     }
@@ -1380,8 +1380,8 @@ s_no_extra_traits! {
     }
 
     pub union __c_anonymous_xsk_tx_metadata_union {
-        pub request: xsk_tx_metadata_request,
-        pub completion: xsk_tx_metadata_completion,
+        pub request: __c_anonymous_xsk_tx_metadata_request,
+        pub completion: __c_anonymous_xsk_tx_metadata_completion,
     }
 }