otp: Add *.fo in src to gitignore
otp: Add *.fo in src to gitignore

New fop versions have changed where they put this
intermediate file.

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