Following up on r1484439, use the file control api instead of the generic io
control api. Somehow the sqlite implementation renames this to ioctl in its
platform abstraction layer for *nixes.

* subversion/libsvn_subr/io.c
  (includes): Include fcntl.h instead of ioctl.h
  (svn_io_file_flush_to_disk): Use fcntl to perform the sync.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1484445 13f79535-47bb-0310-9956-ffa450edef68