re-add lost option

Author: timfel

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/literal/ListLiteralNode.java

@@ -30,6 +30,7 @@
 import com.oracle.graal.python.builtins.objects.list.PList;
 import com.oracle.graal.python.builtins.objects.tuple.PTuple;
 import com.oracle.graal.python.nodes.PNode;
+import com.oracle.graal.python.runtime.PythonOptions;
 import com.oracle.graal.python.runtime.sequence.storage.DoubleSequenceStorage;
 import com.oracle.graal.python.runtime.sequence.storage.IntSequenceStorage;
 import com.oracle.graal.python.runtime.sequence.storage.ListSequenceStorage;

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/runtime/PythonOptions.java

@@ -49,6 +49,9 @@ private PythonOptions() {
     @Option(category = OptionCategory.DEBUG, help = "") //
     public static final OptionKey<Boolean> TraceSequenceStorageGeneralization = new OptionKey<>(false);
 
+    @Option(category = OptionCategory.DEBUG, help = "") //
+    public static final OptionKey<Boolean> UnboxSequenceStorage = new OptionKey<>(true);
+
     @Option(category = OptionCategory.DEBUG, help = "") //
     public static final OptionKey<Boolean> UnboxSequenceIteration = new OptionKey<>(true);