erts: Optimize erts_qsort_partion_array
erts: Optimize erts_qsort_partion_array

Always move single pivot element into its final place
between first and seconds part.

Also makes code simpler.

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