move windmill defense sounds to general folder

So that other rounds can use them as well.

planet/Defense.ocf/Windmill.ocs/Script.c

@@ -383,7 +383,7 @@ func OnWaveCleared(int wave)
 		DoWealthForAll(bounty);
 	}
 	CustomMessage(Format("$MsgWaveCleared$%s|                                                             ", wave, bounty_msg));
-	Sound("NextWave");
+	Sound("UI::NextWave");
 	// Fade out stuff
 	Airship->AllStop();
 	if (g_object_fade)

planet/Defense.ocf/Windmill.ocs/Sound.ocg/authors.txt

@@ -1,5 +0,0 @@
-NextWave.ogg by daveincamas (http://www.freesound.org/people/daveincamas/sounds/27082/)
-	CC-BY 3.0
-
-Attack.ogg by Erdie (http://www.freesound.org/people/Erdie/sounds/165614/)
-	CC-BY 3.0

planet/Defense.ocf/Windmill.ocs/System.ocg/Airship.c

@@ -53,7 +53,7 @@ public func PrepareToBoard(object cpt)
 	}
 	// Suitable crew
 	if (count >= 5)
-		Sound("Attack");
+		Sound("Clonk::Action::GroupAttack");
 	// Let the captain yell something
 	if (!Random(3) && cpt)
 		cpt->Message(Translate(Format("MsgAttack%d", Random(4))));

planet/Sound.ocg/authors.txt

@@ -86,6 +86,9 @@ jrosin          - Environemnt/Lightning/Thunder4 (https://www.freesound.org/peop
 shaka9          - Environemnt/Lightning/Thunder5 (https://www.freesound.org/people/shaka9/sounds/160514/ adapted by Maikel)
 Harbour11       - UI::Error, UI::Trumpet (both adapted by Sven2; used sound from http://freesound.org/people/Harbour11/sounds/194624/)
 CosmicEmbers    - Objects::LineSnap (cropped/pitch adjusted by Sven2; original from http://freesound.org/people/CosmicEmbers/sounds/161650/)
+daveincamas     - UI::NextWave (http://www.freesound.org/people/daveincamas/sounds/27082/)
+Erdie           - Clonk::Action::GroupAttack.ogg (http://www.freesound.org/people/Erdie/sounds/165614/)
+
 
 The following sounds use two sources: