emacs: don't start processes stopped

It causes this function to fail with:

    let: Wrong type argument: null, t

Support for this was removed from Emacs in April
2019 (5c5e309527e6b582e2c04b83e7af45f3144863ac) because it never
worked correctly (apparently).

This also shouldn't be necessary as sentinels will not be called
unless emacs is idle or waiting for input. Therefore, the
`process-put' calls immediately following the `make-process' call
should always complete before the sentinel is first called.