Set relative hitpoints for completed foundations

Differential Revision: https://code.wildfiregames.com/D1434
Reviewed by: mimo
Comments by: elexis
This was SVN commit r21676.

binaries/data/mods/public/simulation/components/Foundation.js

@@ -401,7 +401,7 @@ Foundation.prototype.Build = function(builderEnt, work)
 
 		var cmpBuildingHealth = Engine.QueryInterface(building, IID_Health);
 		if (cmpBuildingHealth)
-			cmpBuildingHealth.SetHitpoints(cmpHealth.GetHitpoints());
+			cmpBuildingHealth.SetHitpoints(progress * cmpBuildingHealth.GetMaxHitpoints());
 
 		PlaySound("constructed", building);