IOS/FS: Allow IPC interface to be used internally from IOS HLE

This makes it more convenient to emulate timings for IPC commands that
perform internal IOS <-> IOS IPC, for example ES relying on FS
for filesystem access.

Source/Core/Core/State.cpp

@@ -74,7 +74,7 @@ static Common::Event g_compressAndDumpStateSyncEvent;
 static std::thread g_save_thread;
 
 // Don't forget to increase this after doing changes on the savestate system
-constexpr u32 STATE_VERSION = 128;  // Last changed in PR 9366
+constexpr u32 STATE_VERSION = 129;  // Last changed in PR 9511
 
 // Maps savestate versions to Dolphin versions.
 // Versions after 42 don't need to be added to this list,