A typo in FpWeb.HostApp.Simple.pp: missing extension in included file name

FpWeb.HostApp.Simple.pp file contains a typo.

Currently it has the following contents:

{$DEFINE FPC_DOTTEDUNITS}
unit FpWeb.HostApp.Simple;
{$i fpsimpleserver}

Note missing .pp extension in included file name. It causes Lazarus Codetools tests to fail with latest FPC 3.3.1.

I propose to change this file the following way similar to other files of this package:

unit FpWeb.HostApp.Simple;
{$DEFINE FPC_DOTTEDUNITS}
{$i fpsimpleserver.pp}