emacs: fix auto-complete-mode binding
emacs: fix auto-complete-mode binding

rgrinberg/merlin,rgrinberg/merlin,haselwarter/merlin,haselwarter/merlin,the-lambda-church/merlin,chambart/merlin,rgrinberg/merlin,ocaml/merlin,haselwarter/merlin,chriskonstad/merlin,fxfactorial/merlin,dra27/merlin,chambart/merlin,ocaml/merlin,fxfactorial/merlin,dra27/merlin,dra27/merlin,chambart/merlin,the-lambda-church/merlin,fxfactorial/merlin,fxfactorial/merlin,neojski/merlin,dra27/merlin,the-lambda-church/merlin,ocaml/merlin,neojski/merlin,neojski/merlin,chambart/merlin,haselwarter/merlin,neojski/merlin,chriskonstad/merlin,ocaml/merlin,rgrinberg/merlin