[PATCH] emacs: Use `cl-lib' instead of deprecated `cl'

[Jonas Bernoulli]

David Bremner <david at tethera.net> writes:

> A quick git grep suggests there are still cl-isms in the test-harness.

I've fixed that now, see v2.

> I get 3 test failures

I am having issues running the tests.  Currently
notmuch-mua-send-and-exit in emacs_deliver_message from test-lib.sh
just hangs for me.  I haven't investigated further yet.  So I am
afraid you'll have to run the tests for me again.