src/t_mmap_dio: do not build if !HAVE_AIO

We have a config check for libaio headers, and don't build certain
tools if it is not present, but this one was missed.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Eryu Guan <guaneryu@gmail.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
1 file changed