FPSCounter: Flush the logs every second and close them when the renderer is shut down.

Source/Core/VideoCommon/FPSCounter.cpp

@@ -34,6 +34,12 @@ void Initialize()
 		s_bench_file.close();
 }
 
+void Shutdown()
+{
+	if (s_bench_file.is_open())
+		s_bench_file.close();
+}
+
 static void LogRenderTimeToFile(u64 val)
 {
 	if (!s_bench_file.is_open())
@@ -49,6 +55,7 @@ int Update()
 		s_update_time.Update();
 		s_fps = s_counter - s_fps_last_counter;
 		s_fps_last_counter = s_counter;
+		s_bench_file.flush();
 	}
 
 	if (g_ActiveConfig.bLogRenderTimeToFile)

Source/Core/VideoCommon/FPSCounter.h

@@ -9,6 +9,9 @@ namespace FPSCounter
 // Initializes the FPS counter.
 void Initialize();
 
+// Shutdown the FPS counter by closing the logs.
+void Shutdown();
+
 // Called when a frame is rendered. Returns the value to be displayed on
 // screen as the FPS counter (updated every second).
 int Update();

Source/Core/VideoCommon/RenderBase.cpp

@@ -105,6 +105,8 @@ Renderer::~Renderer()
 	if (pFrameDump.IsOpen())
 		pFrameDump.Close();
 #endif
+
+	FPSCounter::Shutdown();
 }
 
 void Renderer::RenderToXFB(u32 xfbAddr, const EFBRectangle& sourceRc, u32 fbWidth, u32 fbHeight, float Gamma)