Add GaveUp()

Docs/Luadoc/Lua.xml

@@ -1956,6 +1956,7 @@
 		</Class>
 		<Class name='StageStats'>
 			<Function name='AllFailed'/>
+			<Function name='GaveUp'/>
 			<Function name='GetEarnedExtraStage'/>
 			<Function name='GetGameplaySeconds'/>
 			<Function name='GetMultiPlayerStageStats'/>

Docs/Luadoc/LuaDocumentation.xml

@@ -5969,6 +5969,9 @@ local spr = Def.Sprite{
 	<Function name='AllFailed' return='bool' arguments=''>
 		Returns <code>true</code> if everyone failed.
 	</Function>
+	<Function name='GaveUp' return='bool' arguments=''>
+		Returns <code>true</code> if any player has given up on the song.
+	</Function>
 	<Function name='GetEarnedExtraStage' return='EarnedExtraStage' arguments=''>
 		Returns the <Link class="ENUM" function="EarnedExtraStage">EarnedExtraStage</Link> value.
 	</Function>