Embedded shorthand pattern match doesn't work in async functions

[davej]

For example, this fails with Illegal clause error:

async manual-install = (match) ->
    "Nginx" -> await nginx-setup.manual-details()
    "Apache" -> await apache-setup.manual-details()

But the longhand works fine:

async manual-install = (type) ->
   match type:
      "Nginx" -> await nginx-setup.manual-details()
      "Apache" -> await apache-setup.manual-details()