BaseTools: fix gcc12 warning

BaseTools: fix gcc12 warning

GenFfs.c:545:5: error: pointer ?InFileHandle? used after ?fclose? [-Werror=use-after-free]
  545 |     Error(NULL, 0, 4001, "Resource", "memory cannot be allocated  of %s", InFileHandle);
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
GenFfs.c:544:5: note: call to ?fclose? here
  544 |     fclose (InFileHandle);
      |     ^~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Bob Feng <bob.c.feng@intel.com>