RFR: 8046269: Build broken : THIS_FILE : undeclared identifier

[Seán Coffey]

jdk7u-dev has windows build issues since JDK-8032901 fix was pushed.
bug report : https://bugs.openjdk.java.net/browse/JDK-8046269

Fix is simple and involves defining THIS_FILE if not defined. Not an 
issue for JDK 8u since that logic is already there.

> diff --git a/src/windows/transport/shmem/shmem_md.c 
> b/src/windows/transport/shmem/shmem_md.c
> --- a/src/windows/transport/shmem/shmem_md.c
> +++ b/src/windows/transport/shmem/shmem_md.c
> @@ -1,5 +1,5 @@
>  /*
> - * Copyright (c) 1999, 2003, Oracle and/or its affiliates. All rights 
> reserved.
> + * Copyright (c) 1999, 2014, Oracle and/or its affiliates. All rights 
> reserved.
>   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
>   *
>   * This code is free software; you can redistribute it and/or modify it
> @@ -30,6 +30,11 @@
>  #include "sysShmem.h"
>  #include "shmemBase.h"  /* for exitTransportWithError */
>
> +/* Use THIS_FILE when it is available. */
> +#ifndef THIS_FILE
> +    #define THIS_FILE __FILE__
> +#endif
> +
>  /*
>   * These functions are not completely universal. For now, they are used
>   * exclusively for Jbug's shared memory transport mechanism. They have

regards,
Sean.