Error in s390x

[nobody4t]

Hi maintainer,

I am try to build leveldb in s390. in ubuntu16.04
But Got this error as below, not sure how to fix yet. Just got a quick ask, if you got the answer.
thanks.

error: #error Please implement AtomicPointer for this platform.

[lemenkov]

@WandyLau see #194.

This bugreport is also related - https://bugzilla.redhat.com/1340829