refactoring: update ast structure of "IncludeOnce" node

internal/php7/parser_test.go

@@ -39864,7 +39864,7 @@ func TestExprInclude_Once(t *testing.T) {
 						StartPos:  3,
 						EndPos:    18,
 					},
-					IncludeTkn: &token.Token{
+					IncludeOnceTkn: &token.Token{
 						ID:    token.T_INCLUDE_ONCE,
 						Value: []byte("include_once"),
 						Position: &position.Position{

internal/php7/php7.go

@@ -7006,9 +7006,9 @@ yydefault:
 		// line internal/php7/php7.y:4293
 		{
 			yyVAL.node = &ast.ExprIncludeOnce{
-				Position:   yylex.(*Parser).builder.NewTokenNodePosition(yyDollar[1].token, yyDollar[2].node),
-				IncludeTkn: yyDollar[1].token,
-				Expr:       yyDollar[2].node,
+				Position:       yylex.(*Parser).builder.NewTokenNodePosition(yyDollar[1].token, yyDollar[2].node),
+				IncludeOnceTkn: yyDollar[1].token,
+				Expr:           yyDollar[2].node,
 			}
 		}
 	case 489:

internal/php7/php7.y

@@ -4292,9 +4292,9 @@ internal_functions_in_yacc:
     |   T_INCLUDE_ONCE expr
             {
                 $$ = &ast.ExprIncludeOnce{
-                    Position: yylex.(*Parser).builder.NewTokenNodePosition($1, $2),
-                    IncludeTkn: $1,
-                    Expr:       $2,
+                    Position:       yylex.(*Parser).builder.NewTokenNodePosition($1, $2),
+                    IncludeOnceTkn: $1,
+                    Expr:           $2,
                 }
             }
     |   T_EVAL '(' expr ')'