erts: Fix ets:rename bug when 2nd arg is not an atom
erts: Fix ets:rename bug when 2nd arg is not an atom

Bug introduced on master.

getong/otp,isvilen/otp,mikpe/otp,dumbbell/otp,vinoski/otp,rlipscombe/otp,g-andrade/otp,emacsmirror/erlang,bjorng/otp,g-andrade/otp,potatosalad/otp,uabboli/otp,emacsmirror/erlang,jj1bdx/otp,isvilen/otp,jj1bdx/otp,dumbbell/otp,dgud/otp,vinoski/otp,bjorng/otp,bjorng/otp,vinoski/otp,jj1bdx/otp,dgud/otp,dumbbell/otp,dgud/otp,erlang/otp,jj1bdx/otp,rlipscombe/otp,erlang/otp,jj1bdx/otp,vinoski/otp,dgud/otp,dumbbell/otp,erlang/otp,getong/otp,emacsmirror/erlang,bjorng/otp,emacsmirror/erlang,isvilen/otp,dgud/otp,mikpe/otp,getong/otp,potatosalad/otp,jj1bdx/otp,emacsmirror/erlang,emacsmirror/erlang,dumbbell/otp,g-andrade/otp,jj1bdx/otp,erlang/otp,ferd/otp,uabboli/otp,emacsmirror/erlang,dumbbell/otp,potatosalad/otp,getong/otp,vinoski/otp,bjorng/otp,vinoski/otp,uabboli/otp,ferd/otp,rlipscombe/otp,rlipscombe/otp,ferd/otp,jj1bdx/otp,g-andrade/otp,dumbbell/otp,erlang/otp,bjorng/otp,dgud/otp,ferd/otp,rlipscombe/otp,emacsmirror/erlang,ferd/otp,vinoski/otp,erlang/otp,emacsmirror/erlang,getong/otp,erlang/otp,uabboli/otp,ferd/otp,rlipscombe/otp,getong/otp,uabboli/otp,g-andrade/otp,mikpe/otp,vinoski/otp,isvilen/otp,potatosalad/otp,getong/otp,dgud/otp,erlang/otp,bjorng/otp,erlang/otp,isvilen/otp,bjorng/otp,uabboli/otp,mikpe/otp,isvilen/otp,ferd/otp,dumbbell/otp,potatosalad/otp,potatosalad/otp,isvilen/otp,potatosalad/otp,getong/otp,vinoski/otp,g-andrade/otp,rlipscombe/otp,mikpe/otp,potatosalad/otp,potatosalad/otp,g-andrade/otp,g-andrade/otp,mikpe/otp,mikpe/otp,dumbbell/otp,rlipscombe/otp,bjorng/otp,getong/otp,ferd/otp,uabboli/otp,isvilen/otp,jj1bdx/otp,g-andrade/otp,isvilen/otp,ferd/otp,rlipscombe/otp,mikpe/otp,dgud/otp,dgud/otp,mikpe/otp,uabboli/otp,getong/otp,isvilen/otp,erlang/otp,dumbbell/otp,rlipscombe/otp,uabboli/otp,vinoski/otp,potatosalad/otp,mikpe/otp,dgud/otp,g-andrade/otp,emacsmirror/erlang,bjorng/otp,jj1bdx/otp