Rename POM changes to build system changes

Signed-off-by: Mariell Hoversholm <proximyst@proximyst.com>

patches/server/0003-Build-system-changes.patch

@@ -1,7 +1,7 @@
 From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
 From: Zach Brown <zach.brown@destroystokyo.com>
 Date: Mon, 29 Feb 2016 20:40:33 -0600
-Subject: [PATCH] POM Changes
+Subject: [PATCH] Build system changes
 
 
 diff --git a/build.gradle.kts b/build.gradle.kts