Video Core: debug tools (#412)

* video_core: better use of rdoc markers

* renderer_vulkan: added gpu assisted validation

* renderer_vulkan: make nv_checkpoints operational

* video_core: unified Vulkan objects names

src/common/config.h

@@ -27,6 +27,7 @@ bool nullGpu();
 bool dumpShaders();
 bool dumpPM4();
 bool isRdocEnabled();
+bool isMarkersEnabled();
 u32 vblankDiv();
 
 void setDebugDump(bool enable);
@@ -50,6 +51,7 @@ void setRdocEnabled(bool enable);
 
 bool vkValidationEnabled();
 bool vkValidationSyncEnabled();
+bool vkValidationGpuEnabled();
 
 // Gui
 void setMainWindowGeometry(u32 x, u32 y, u32 w, u32 h);