Ghostwriter: add patch to fix build (#6554)

Fixes #6550

app-text/ghostwriter/patches/ghostwriter-1.7.4.patchset

@@ -0,0 +1,21 @@
+From a999c99cb9adb59674558baa678f674fc7508632 Mon Sep 17 00:00:00 2001
+From: Humdinger <humdingerb@gmail.com>
+Date: Sat, 22 Jan 2022 11:08:01 +0100
+Subject: Include QPainterPath header to fix build
+
+
+diff --git a/src/MarkdownEditor.cpp b/src/MarkdownEditor.cpp
+index 128cf52..65f9624 100644
+--- a/src/MarkdownEditor.cpp
++++ b/src/MarkdownEditor.cpp
+@@ -31,6 +31,7 @@
+ #include <QColor>
+ #include <QApplication>
+ #include <QDesktopWidget>
++#include <QPainterPath>
+ #include <QUrl>
+ #include <QPixmap>
+ #include <QPainter>
+-- 
+2.30.2
+