Revert "base64 benchmark not building (emilypi/base64#5)"
Revert "base64 benchmark not building (emilypi/base64#5)"

This reverts commit a08e5185953653ab1ae8a970b201ab8d5491feeb.

fpco/stackage,clinty/stackage,jonschoning/stackage,michalkonecny/stackage,fimad/stackage,Daniel-Diaz/stackage,iand675/stackage,asr/stackage,soenkehahn/stackage,simonmichael/stackage,massysett/stackage,athanclark/stackage,mrkkrp/stackage,spencerjanssen/stackage,stackbuilders/stackage