[Kernel] Added support for writing/reading GPD files

This breaks settings in games that are using them and savefiles in games that use settings to store progress

src/xenia/vfs/devices/disc_zarchive_entry.h

@@ -45,6 +45,8 @@ class DiscZarchiveEntry : public Entry {
   friend class DiscZarchiveDevice;
   friend class DiscZarchiveFile;
 
+  bool DeleteEntryInternal(Entry* entry) override;
+
   uint32_t handle_;
   size_t data_offset_;
   size_t data_size_;