Ports: Update libgpg-error's patches to use git patches

Ports/libgpg-error/patches/0001-Include-errno.h.patch

@@ -0,0 +1,24 @@
+From ea4d2441210e9bacb778e892227ed99ff496a9e1 Mon Sep 17 00:00:00 2001
+From: Gunnar Beutner <gbeutner@serenityos.org>
+Date: Wed, 14 Apr 2021 04:32:34 +0200
+Subject: [PATCH 1/2] Include errno.h
+
+---
+ src/mkerrcodes.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/src/mkerrcodes.c b/src/mkerrcodes.c
+index 29c1cc2..a1cbd52 100644
+--- a/src/mkerrcodes.c
++++ b/src/mkerrcodes.c
+@@ -22,6 +22,7 @@
+    system, while this file will be run on the build system.  */
+ 
+ #include <stdio.h>
++#include <errno.h>
+ 
+ #include "mkerrcodes.h"
+ 
+-- 
+2.36.1
+