s3: libsmb: Ensure return from net_share_enum_rpc() sets cli->raw_status on error.

s3: libsmb: Ensure return from net_share_enum_rpc() sets cli->raw_status on error.

Convert net_share_enum_rpc() to return an NTSTATUS and ensure the
status is set correctly on error so SMBC_errno() can return it.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=14176

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Autobuild-User(master): Andreas Schneider <asn@cryptomilk.org>
Autobuild-Date(master): Tue Nov  5 12:36:48 UTC 2019 on sn-devel-184

(cherry picked from commit ff47cc661d432a9337ade9a232a4f49164652812)