Fix rescheduling timers after suspension

* lisp/emacs-lisp/timer.el (timer-event-handler): Fix the
comparison between next invocation time and current time.
1 job for master in 54 minutes and 41 seconds (queued for 2 seconds)
Status Job ID Name Coverage
failed #1519


Name Stage Failure
test-all Test
make[2]: *** [check-doit] Error 1
Makefile:313: recipe for target 'check-doit' failed
make[2]: Leaving directory '/builds/emacs/emacs/test'
Makefile:288: recipe for target 'check-expensive' failed
make[1]: *** [check-expensive] Error 2
make[1]: Leaving directory '/builds/emacs/emacs/test'
Makefile:962: recipe for target 'check-expensive' failed
make: *** [check-expensive] Error 2
ERROR: Job failed: exit code 1