Reschedule in sceKernelReferThreadStatus().

It's often called in loops waiting for a thread to wake up.

Fixes .hack//Link's sluggish performance.

Core/HLE/sceKernelThread.cpp

@@ -1319,6 +1319,7 @@ u32 sceKernelReferThreadStatus(u32 threadID, u32 statusPtr)
 	}
 
 	hleEatCycles(1220);
+	hleReSchedule("refer thread status");
 	return 0;
 }