libtwrpgui: convert gui to use new ziparchive library

Change-Id: Iea94855257c6d02c2f663c25d390cb1cfb91a727
diff --git a/gui/fill.cpp b/gui/fill.cpp
index 3cfbe6e..f813bf3 100644
--- a/gui/fill.cpp
+++ b/gui/fill.cpp
@@ -38,7 +38,7 @@
 extern "C" {
 #include "../twcommon.h"
 }
-#include "../minuitwrp/minui.h"
+#include "minuitwrp/minui.h"
 
 #include "rapidxml.hpp"
 #include "objects.hpp"