libtwrpgui: convert gui to use new ziparchive library

Change-Id: Iea94855257c6d02c2f663c25d390cb1cfb91a727
diff --git a/gui/objects.hpp b/gui/objects.hpp
index d4b42c2..3948fb2 100755
--- a/gui/objects.hpp
+++ b/gui/objects.hpp
@@ -34,7 +34,7 @@
 #include "resources.hpp"
 #include "pages.hpp"
 #include "../partitions.hpp"
-#include "placement.h"
+#include "gui/placement.h"
 
 #ifndef TW_X_OFFSET
 #define TW_X_OFFSET 0