FILE_SUPPORTS_SPARSE_FILES not set

[Christoph Hellwig]

On Thu, Aug 14, 2014 at 01:37:16PM -0700, Jeremy Allison wrote:
> > Log a bug and I'll update it for Linux/BSD.
> 
> I think this is what you want. Can I get a second
> Team reviewer for master ?

Note that sparse file support is a something defined by the on disk
filesystem format.  I had to special case hfsplus so that we don't
run tests that rely on efficient sparse file support in xfstests for
example.