Fix an issue that "Is Single File Release" column is not added to Tracks table.

(cherry picked from commit 2d7e4bafaf4678f5aea1b91df2f44be5ffccd074)

src/NzbDrone.Core/Datastore/Migration/073_add_flac_cue.cs

@@ -8,6 +8,7 @@ namespace NzbDrone.Core.Datastore.Migration
     {
         protected override void MainDbUpgrade()
         {
+            Alter.Table("Tracks").AddColumn("IsSingleFileRelease").AsBoolean().WithDefaultValue(false);
             Alter.Table("TrackFiles").AddColumn("IsSingleFileRelease").AsBoolean().WithDefaultValue(false);
         }
     }