* lisp/calculator.el (cl-lib): Require at run-time as well.

Needed since we pass the `cl-flet` macro to `eval` in `calculator-funcall`.
1 job for master in 90 minutes and 1 second (queued for 4 seconds)
Status Job ID Name Coverage
  Test
failed #4485
test-all

01:30:01

 
Name Stage Failure
failed
test-all Test The script exceeded the maximum execution time set for the job
  GEN      lisp/makesum-tests.log
ELC lisp/man-tests.elc
GEN lisp/man-tests.log
ELC lisp/md4-tests.elc
GEN lisp/md4-tests.log
ELC lisp/minibuffer-tests.elc
GEN lisp/minibuffer-tests.log
Pulling docker image gitlab/gitlab-runner-helper:x86_64-d0b76032 ...
ERROR: Job failed: execution took longer than 1h30m0s seconds