[php] PDO::ATTR_DRIVER_NAME is an integer (#10319)

std/php/db/PDO.hx

@@ -61,7 +61,7 @@ extern class PDO {
 	@:phpClassConst static final ATTR_CASE:Int;
 	@:phpClassConst static final ATTR_CURSOR_NAME:Int;
 	@:phpClassConst static final ATTR_CURSOR:Int;
-	@:phpClassConst static final ATTR_DRIVER_NAME:String;
+	@:phpClassConst static final ATTR_DRIVER_NAME:Int;
 	@:phpClassConst static final ATTR_ORACLE_NULLS:Int;
 	@:phpClassConst static final ATTR_PERSISTENT:Int;
 	@:phpClassConst static final ATTR_STATEMENT_CLASS:Int;