Use spawn instead of execFile for squirrel events

src/browser/squirrel-events.coffee

@@ -2,24 +2,20 @@ app = require 'app'
 ChildProcess = require 'child_process'
 path = require 'path'
 
-updateDotExe = path.resolve(path.dirname(process.execPath), '..', 'Update.exe')
-exeName = path.basename(process.execPath)
-
-createShortcut = ->
-  ChildProcess.execFile updateDotExe, ['--createShortcut', exeName], ->
-    app.quit()
-
-removeShortcut = ->
-  ChildProcess.execFile updateDotExe, ['--removeShortcut', exeName], ->
-    app.quit()
+spawnUpdateAndQuit = (option) ->
+  updateDotExe = path.resolve(path.dirname(process.execPath), '..', 'Update.exe')
+  exeName = path.basename(process.execPath)
+  updateProcess = ChildProcess.spawn(updateDotExe, ["--#{option}", exeName])
+  updateProcess.on 'error', -> # Ignore errors
+  updateProcess.on 'close', -> app.quit()
 
 module.exports = ->
   switch process.argv[1]
     when '--squirrel-install', '--squirrel-updated'
-      createShortcut()
+      spawnUpdateAndQuit('createShortcut')
       true
     when '--squirrel-uninstall'
-      removeShortcut()
+      spawnUpdateAndQuit('removeShortcut')
       true
     when '--squirrel-obsolete'
       app.quit()