Fix duplicate name when same block used twice in one town

Potential fix for #2237.
This code was removed by #2100. However, it's necessary to edit then store a *copy* of block data for each block to have a unique name seed from MAPS.BSA, even when starting from same RMB data.
If data is modified in same instance of RMB data then second time block data is read it effectively overwrites first.
@df-ferital Please let me know if this causes any problems with your RMB caching. I'm not sure why this removed and I didn't catch this outcome in my review of your RMB caching PR. Thank you! :)

Assets/Scripts/Utility/RMBLayout.cs

@@ -643,6 +643,11 @@ public static DFBlock[] GetLocationBuildingData(in DFLocation location)
                     if (!contentReader.GetBlock(blockName, out block))
                         throw new Exception("GetCompleteBuildingData() could not read block " + blockName);
 
+                    // Make a copy of the building data array for our block copy since we're modifying it
+                    DFLocation.BuildingData[] buildingArray = new DFLocation.BuildingData[block.RmbBlock.FldHeader.BuildingDataList.Length];
+                    Array.Copy(block.RmbBlock.FldHeader.BuildingDataList, buildingArray, block.RmbBlock.FldHeader.BuildingDataList.Length);
+                    block.RmbBlock.FldHeader.BuildingDataList = buildingArray;
+
                     // Assign building data for this block
                     BuildingReplacementData buildingReplacementData;
                     for (int i = 0; i < block.RmbBlock.SubRecords.Length; i++)