Revert "gstdio: #include fcntl.h on UNIX in gstdio.h"
Revert "gstdio: #include fcntl.h on UNIX in gstdio.h"

This reverts commit 6f8073d44ab02e9d641ccbe8c2640796ca1456ca.

As per further discussion on bug #781598, we can’t do this in GLib,
since fcntl.h is not guaranteed to be present on all Unix systems. Users
of GLib *must* do a header check (for example, using AC_CHECK_HEADERS)
and #include fcntl.h themselves.

endlessm/glib,johne53/MB3Glib,johne53/MB3Glib,johne53/MB3Glib,endlessm/glib,johne53/MB3Glib,endlessm/glib,johne53/MB3Glib,endlessm/glib,johne53/MB3Glib,endlessm/glib