Make sure there's a log line at minimum whenever an API is initialised

renderdoc/driver/d3d11/d3d11_hooks.cpp

@@ -250,7 +250,7 @@ private:
 		}
 		else if(SUCCEEDED(ret))
 		{
-			RDCDEBUG("succeeded.");
+			RDCLOG("Created wrapped D3D11 device.");
 		}
 		else
 		{

renderdoc/driver/vulkan/wrappers/vk_device_funcs.cpp

@@ -235,6 +235,11 @@ VkResult WrappedVulkan::vkCreateInstance(
 		ObjDisp(m_Instance)->CreateDebugReportCallbackEXT(Unwrap(m_Instance), &debugInfo, NULL, &m_DbgMsgCallback);
 	}
 
+	if(ret == VK_SUCCESS)
+	{
+		RDCLOG("Initialised capture layer in Vulkan instance.");
+	}
+
 	return ret;
 }