erts: Fix erl_printf on Solaris
erts: Fix erl_printf on Solaris

flockfile(3c) and friends are hidden behind the __EXTENSIONS__
feature macro.

electricimp/otp,vladdu/otp,rlipscombe/otp,bsmr-erlang/otp,dumbbell/otp,g-andrade/otp,kvakvs/otp,dgud/otp,dumbbell/otp,uabboli/otp,bjorng/otp,uabboli/otp,mikpe/otp,lrascao/otp,mikpe/otp,g-andrade/otp,emacsmirror/erlang,emacsmirror/erlang,jj1bdx/otp,mikpe/otp,ferd/otp,dgud/otp,kvakvs/otp,g-andrade/otp,getong/otp,rlipscombe/otp,jj1bdx/otp,RoadRunnr/otp,aboroska/otp,aboroska/otp,erlang/otp,jj1bdx/otp,rlipscombe/otp,dgud/otp,lrascao/otp,vinoski/otp,jj1bdx/otp,emacsmirror/erlang,bsmr-erlang/otp,bsmr-erlang/otp,kvakvs/otp,rlipscombe/otp,emacsmirror/erlang,vinoski/otp,jj1bdx/otp,rlipscombe/otp,vladdu/otp,jj1bdx/otp,isvilen/otp,getong/otp,erlang/otp,getong/otp,erlang/otp,dumbbell/otp,aboroska/otp,getong/otp,lrascao/otp,kvakvs/otp,uabboli/otp,RoadRunnr/otp,uabboli/otp,potatosalad/otp,isvilen/otp,potatosalad/otp,vinoski/otp,uabboli/otp,potatosalad/otp,dgud/otp,ferd/otp,bjorng/otp,RoadRunnr/otp,ferd/otp,isvilen/otp,erlang/otp,bjorng/otp,electricimp/otp,vladdu/otp,vladdu/otp,rlipscombe/otp,aboroska/otp,getong/otp,getong/otp,jj1bdx/otp,vladdu/otp,rlipscombe/otp,bjorng/otp,mikpe/otp,electricimp/otp,g-andrade/otp,emacsmirror/erlang,mikpe/otp,g-andrade/otp,dgud/otp,bsmr-erlang/otp,erlang/otp,aboroska/otp,bsmr-erlang/otp,bjorng/otp,legoscia/otp,vinoski/otp,jj1bdx/otp,bsmr-erlang/otp,mikpe/otp,lrascao/otp,dgud/otp,g-andrade/otp,emacsmirror/erlang,kvakvs/otp,ferd/otp,electricimp/otp,RoadRunnr/otp,emacsmirror/erlang,electricimp/otp,ferd/otp,getong/otp,uabboli/otp,erlang/otp,bjorng/otp,emacsmirror/erlang,dumbbell/otp,RoadRunnr/otp,mikpe/otp,bjorng/otp,vladdu/otp,jj1bdx/otp,erlang/otp,lrascao/otp,dumbbell/otp,legoscia/otp,potatosalad/otp,vladdu/otp,vinoski/otp,kvakvs/otp,erlang/otp,dgud/otp,mikpe/otp,bjorng/otp,isvilen/otp,mikpe/otp,vladdu/otp,dumbbell/otp,vinoski/otp,potatosalad/otp,legoscia/otp,dgud/otp,bsmr-erlang/otp,uabboli/otp,isvilen/otp,ferd/otp,electricimp/otp,legoscia/otp,electricimp/otp,legoscia/otp,uabboli/otp,electricimp/otp,bjorng/otp,dumbbell/otp,dumbbell/otp,legoscia/otp,electricimp/otp,getong/otp,vinoski/otp,jj1bdx/otp,emacsmirror/erlang,bjorng/otp,vinoski/otp,aboroska/otp,kvakvs/otp,lrascao/otp,RoadRunnr/otp,legoscia/otp,ferd/otp,RoadRunnr/otp,bsmr-erlang/otp,isvilen/otp,g-andrade/otp,mikpe/otp,potatosalad/otp,isvilen/otp,vladdu/otp,getong/otp,RoadRunnr/otp,aboroska/otp,erlang/otp,legoscia/otp,ferd/otp,potatosalad/otp,g-andrade/otp,potatosalad/otp,getong/otp,ferd/otp,legoscia/otp,rlipscombe/otp,RoadRunnr/otp,isvilen/otp,vinoski/otp,dgud/otp,isvilen/otp,dumbbell/otp,rlipscombe/otp,dumbbell/otp,potatosalad/otp,aboroska/otp,aboroska/otp,lrascao/otp,kvakvs/otp,kvakvs/otp,bsmr-erlang/otp,emacsmirror/erlang,isvilen/otp,vinoski/otp,potatosalad/otp,uabboli/otp,dgud/otp,erlang/otp,g-andrade/otp,g-andrade/otp,rlipscombe/otp,lrascao/otp,lrascao/otp