package/zfs: new package

package/zfs: new package

OpenZFS is an advanced file system and volume manager which was originally
developed for Solaris and is now maintained by the OpenZFS community. This
repository contains the code for running OpenZFS on Linux and FreeBSD.

http://zfsonlinux.org/

Signed-off-by: José Luis Salvador Rufo <salvador.joseluis@gmail.com>
[me:
  - fix test case on how to use a pre-built toolchain
  - reorder the test case config
  - add test case with glibc
  - drop superflous test timeout override
  - only select libtirpc when C library lacks native RPC
  - drop unused ZFS_MODULES variable
  - drop ZFS_CPE_ID_PREFIX and ZFS_AUTORECONF_OPTS which are defaults
  - drop NLS options, already set in a generic manner
  - drop incomplete/improper sysvinit support
  - some cosmetics
]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>