s3: VFS: vfs_streams_xattr.c: Make streams_xattr_open() store the same path as stream...

s3: VFS: vfs_streams_xattr.c: Make streams_xattr_open() store the same path as streams_xattr_recheck().

If the open is changing directories, fsp->fsp_name->base_name
will be the full path from the share root, whilst
smb_fname will be relative to the $cwd.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=12546

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Ralph Böhme <slow@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Thu Feb  2 01:55:42 CET 2017 on sn-devel-144