Ports: Add Serious Sam - The First Encounter

The actual port is SeriousSamClassic, but only The First Encounter is
built and installed. It should be relatively easy to also build and
install The Second Encounter from this port in the future.

Ports/serious-sam-classic/patches/0004-Engine-Remove-malloc.h.patch

@@ -0,0 +1,23 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Jelle Raaijmakers <jelle@gmta.nl>
+Date: Mon, 24 Apr 2023 15:52:50 +0200
+Subject: [PATCH] Engine: Remove malloc.h
+
+This seems to be a non-standard header. The API used by the game already
+finds its way through the inclusion of other headers, so leave this out.
+---
+ SamTFE/Sources/Engine/Engine.h | 1 -
+ 1 file changed, 1 deletion(-)
+
+diff --git a/SamTFE/Sources/Engine/Engine.h b/SamTFE/Sources/Engine/Engine.h
+index 7466327d68cb3de4aa86b2f5c0ec67881bf67eb8..fe62f26e60ce33ea31a63cef619097c913dad05f 100644
+--- a/SamTFE/Sources/Engine/Engine.h
++++ b/SamTFE/Sources/Engine/Engine.h
+@@ -31,7 +31,6 @@ with this program; if not, write to the Free Software Foundation, Inc.,
+ #endif
+ 
+ #include <stdlib.h>
+-#include <malloc.h>
+ #include <stdarg.h>
+ #include <stdio.h>
+ #include <string.h>