Add LSL transaction_result event.

This is cinderblocks' transaction_result.diff from http://opensimulator.org/mantis/view.php?id=7329 but I have used lsl.parser.cs and lsl.lexer.cs files generated directly from opensim-libs rather than those supplied in the patch.
I also added scriptEvents.transaction_reuslt.
The required parser/lexer generation file changes were made in commit d564f28 in the opensim-libs repo.
Thanks!

OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs

@@ -75,6 +75,7 @@ namespace OpenSim.Region.Framework.Scenes
         touch = 8,
         touch_end = 536870912,
         touch_start = 2097152,
+        transaction_result = 33554432,
         object_rez = 4194304
     }
 

OpenSim/Region/ScriptEngine/Shared/Api/Runtime/Executor.cs

@@ -77,6 +77,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.ScriptBase
             touch = 8,
             touch_end = 536870912,
             touch_start = 2097152,
+            transaction_result = 33554432,
             object_rez = 4194304
         }
 
@@ -235,6 +236,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.ScriptBase
             m_eventFlagsMap.Add("touch", scriptEvents.touch);
             m_eventFlagsMap.Add("touch_end", scriptEvents.touch_end);
             m_eventFlagsMap.Add("touch_start", scriptEvents.touch_start);
+            m_eventFlagsMap.Add("transaction_result", scriptEvents.transaction_result);
             m_eventFlagsMap.Add("object_rez", scriptEvents.object_rez);
         }
     }