emacs: fix some synchronization issue
emacs: fix some synchronization issue

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