[xbuild] Log TaskFinished even when task fails to initialize.

mcs/class/Microsoft.Build.Engine/Microsoft.Build.BuildEngine/BuildTask.cs

@@ -84,12 +84,13 @@ namespace Microsoft.Build.BuildEngine {
 		[MonoTODO]
 		public bool Execute ()
 		{
-			bool		result;
+			bool		result = false;
 			TaskEngine	taskEngine;
 
 			LogTaskStarted ();
 			ITask task = null;
 
+			try {
 				try {
 					task = InitializeTask ();
 				} catch (Exception e) {
@@ -111,8 +112,9 @@ namespace Microsoft.Build.BuildEngine {
 							"Error executing task {0}: {1}", taskElement.LocalName, e.ToString ());
 					result = false;
 				}
-
+			} finally {
 				LogTaskFinished (result);
+			}
 
 			return result;
 		}