Ports: Update flex's patches to use git patches

Ports/flex/patches/0006-Include-arpa-inet.h.patch

@@ -0,0 +1,26 @@
+From f6d725687a0de5f489b37bf6607795e35be0fd65 Mon Sep 17 00:00:00 2001
+From: Brian Callahan <bcallah@openbsd.org>
+Date: Thu, 23 Jan 2020 23:43:31 -0500
+Subject: [PATCH 6/6] Include <arpa/inet.h>
+
+FIXME: This patch does not have any accompanying information.
+---
+ src/tables.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/src/tables.c b/src/tables.c
+index 980d2e9..0824a7f 100644
+--- a/src/tables.c
++++ b/src/tables.c
+@@ -33,6 +33,8 @@
+  */
+ 
+ 
++#include <arpa/inet.h>
++
+ #include "flexdef.h"
+ #include "tables.h"
+ 
+-- 
+2.36.1
+