VideoCommon: Support dumping frames to images

This is mainly for potential Android fifoci usage, and thus is not
exposed anywhere in the UI. To enable, set DumpFramesAsImages under
Settings in GFX.ini.

Source/Core/VideoCommon/VideoConfig.cpp

@@ -71,6 +71,7 @@ void VideoConfig::Load(const std::string& ini_file)
   settings->Get("ConvertHiresTextures", &bConvertHiresTextures, 0);
   settings->Get("CacheHiresTextures", &bCacheHiresTextures, 0);
   settings->Get("DumpEFBTarget", &bDumpEFBTarget, 0);
+  settings->Get("DumpFramesAsImages", &bDumpFramesAsImages, 0);
   settings->Get("FreeLook", &bFreeLook, 0);
   settings->Get("UseFFV1", &bUseFFV1, 0);
   settings->Get("EnablePixelLighting", &bEnablePixelLighting, 0);
@@ -287,6 +288,7 @@ void VideoConfig::Save(const std::string& ini_file)
   settings->Set("ConvertHiresTextures", bConvertHiresTextures);
   settings->Set("CacheHiresTextures", bCacheHiresTextures);
   settings->Set("DumpEFBTarget", bDumpEFBTarget);
+  settings->Set("DumpFramesAsImages", bDumpFramesAsImages);
   settings->Set("FreeLook", bFreeLook);
   settings->Set("UseFFV1", bUseFFV1);
   settings->Set("EnablePixelLighting", bEnablePixelLighting);