docs: build of 32 bit from a machine with 64 bit
docs: build of 32 bit from a machine with 64 bit

Close #317
loopline-systems/electron-builder,mastergberry/electron-builder,MariaDima/electron-builder,aulvi/electron-builder,develar/electron-builder,badams/electron-builder,badams/electron-builder,mastergberry/electron-builder,loopline-systems/electron-builder,electron-userland/electron-builder,ledinhphuong/electron-builder,mastergberry/electron-builder,mastergberry/electron-builder,electron-userland/electron-builder,develar/electron-builder,MariaDima/electron-builder,ledinhphuong/electron-builder,MariaDima/electron-builder,badams/electron-builder,aulvi/electron-builder,develar/electron-builder,electron-userland/electron-builder,aulvi/electron-builder,ledinhphuong/electron-builder,loopline-systems/electron-builder,loopline-systems/electron-builder,MariaDima/electron-builder,develar/electron-builder,MariaDima/electron-builder,MariaDima/electron-builder,ledinhphuong/electron-builder,aulvi/electron-builder,badams/electron-builder,ledinhphuong/electron-builder,loopline-systems/electron-builder,ledinhphuong/electron-builder