Fix hurd expected fcntl version

Different than Linux, hurd does not need the OFD locks fix from
06ab719d (since OFD locks are current Linux specific). This in
turn allows hurd to not provide a fcntl compat symbol.

Checked on a i686-gnu with check-abi.

	* sysdeps/mach/hurd/i386/libc.abilist [GLIBC_2.28] (fcntl): Remove
	symbol.