C++: Update expected test results

Author: jketema

cpp/ql/test/library-tests/ir/ir/PrintAST.expected

@@ -24309,7 +24309,7 @@ ir.cpp:
 # 2727|         getArrayBase(): [VariableAccess] x
 # 2727|             Type = [SpecifiedType] const WithBracketOperator
 # 2727|             ValueCategory = lvalue
-# 2727|         getArrayOffset(): [VariableAccess] i
+# 2727|         getArrayOffset(0): [VariableAccess] i
 # 2727|             Type = [IntType] int
 # 2727|             ValueCategory = prvalue(load)
 # 2727|       getExpr().getFullyConverted(): [ReferenceDereferenceExpr] (reference dereference)

cpp/ql/test/library-tests/subscript_operator/PrintAST.expected

@@ -59,11 +59,11 @@ test.cpp:
 #   11|         getArrayBase(): [VariableAccess] s
 #   11|             Type = [Struct] S
 #   11|             ValueCategory = lvalue
-#   11|         getArrayOffset(): [Literal] 1
+#   11|         getArrayOffset(0): [Literal] 1
 #   11|             Type = [IntType] int
 #   11|             Value = [Literal] 1
 #   11|             ValueCategory = prvalue
-#   11|         getArgument(1): [Literal] 2
+#   11|         getArrayOffset(1): [Literal] 2
 #   11|             Type = [IntType] int
 #   11|             Value = [Literal] 2
 #   11|             ValueCategory = prvalue