fix struct arphdr alignment on OpenBSD

Author: semarie

src/unix/bsd/netbsdlike/mod.rs

@@ -57,15 +57,6 @@ s! {
         pub l_type: ::c_short,
         pub l_whence: ::c_short,
     }
-
-    #[repr(packed)]
-    pub struct arphdr {
-        pub ar_hrd: u16,
-        pub ar_pro: u16,
-        pub ar_hln: u8,
-        pub ar_pln: u8,
-        pub ar_op: u16,
-    }
 }
 
 pub const D_T_FMT: ::nl_item = 0;

src/unix/bsd/netbsdlike/netbsd/mod.rs

@@ -318,6 +318,15 @@ s! {
         pub ipi_addr: ::in_addr,
         pub ipi_ifindex: ::c_uint,
     }
+
+    #[repr(packed)]
+    pub struct arphdr {
+        pub ar_hrd: u16,
+        pub ar_pro: u16,
+        pub ar_hln: u8,
+        pub ar_pln: u8,
+        pub ar_op: u16,
+    }
 }
 
 pub const AT_FDCWD: ::c_int = -100;

src/unix/bsd/netbsdlike/openbsdlike/mod.rs

@@ -193,6 +193,14 @@ s! {
         pub gid: ::gid_t,
         pub pid: ::pid_t,
     }
+
+    pub struct arphdr {
+        pub ar_hrd: u16,
+        pub ar_pro: u16,
+        pub ar_hln: u8,
+        pub ar_pln: u8,
+        pub ar_op: u16,
+    }
 }
 
 pub const UT_NAMESIZE: usize = 32;