vendor: update all dependencies

vendor/golang.org/x/net/icmp/ipv4.go

@@ -9,9 +9,14 @@ import (
 	"net"
 	"runtime"
 
+	"golang.org/x/net/internal/socket"
 	"golang.org/x/net/ipv4"
 )
 
+// freebsdVersion is set in sys_freebsd.go.
+// See http://www.freebsd.org/doc/en/books/porters-handbook/freebsd-versions.html.
+var freebsdVersion uint32
+
 // ParseIPv4Header parses b as an IPv4 header of ICMP error message
 // invoking packet, which is contained in ICMP error message.
 func ParseIPv4Header(b []byte) (*ipv4.Header, error) {
@@ -36,12 +41,12 @@ func ParseIPv4Header(b []byte) (*ipv4.Header, error) {
 	}
 	switch runtime.GOOS {
 	case "darwin":
-		h.TotalLen = int(nativeEndian.Uint16(b[2:4]))
+		h.TotalLen = int(socket.NativeEndian.Uint16(b[2:4]))
 	case "freebsd":
 		if freebsdVersion >= 1000000 {
 			h.TotalLen = int(binary.BigEndian.Uint16(b[2:4]))
 		} else {
-			h.TotalLen = int(nativeEndian.Uint16(b[2:4]))
+			h.TotalLen = int(socket.NativeEndian.Uint16(b[2:4]))
 		}
 	default:
 		h.TotalLen = int(binary.BigEndian.Uint16(b[2:4]))