Revert "mm: don't show nr_indirectly_reclaimable in /proc/vmstat"

This reverts commit d62b8ac8.

This is a preparation change for merging android-4.14-p.77 into
msm-4.14 branch.

nr_indirectly_reclaimable is useful for getting information on total
pool allocations from ion allocator so keep that in /proc/vmstat and
thereby this change is not needed into msm-4.14.

Change-Id: Ic06bba205cdfe2cc8843c2d371785f1676a06bd0
Signed-off-by: Blagovest Kolenichev <bkolenichev@codeaurora.org>