C++: add upgrade and downgrade scripts

Author: IdrissRio

Diff for: cpp/downgrades/159dbb330468991283454b1ac73b7f8411e97595/aggregate_array_init.ql

@@ -0,0 +1,11 @@
+class Expr extends @expr {
+  string toString() { none() }
+}
+
+class AggregateLiteral extends Expr, @aggregateliteral {
+  override string toString() { none() }
+}
+
+from AggregateLiteral aggregate, Expr initializer, int element_index, int position
+where aggregate_array_init(aggregate, initializer, element_index, position, _)
+select aggregate, initializer, element_index, position

Diff for: cpp/downgrades/159dbb330468991283454b1ac73b7f8411e97595/aggregate_field_init.ql

@@ -0,0 +1,19 @@
+class Expr extends @expr {
+  string toString() { none() }
+}
+
+class Variable extends @variable {
+  string toString() { none() }
+}
+
+class AggregateLiteral extends Expr, @aggregateliteral {
+  override string toString() { none() }
+}
+
+class MemberVariable extends Variable, @membervariable {
+  string toString() { none() }
+}
+
+from AggregateLiteral aggregate, Expr initializer, MemberVariable field, int position
+where aggregate_field_init(aggregate, initializer, field, position, _)
+select aggregate, initializer, field, position