erlang: bump to version 18.3

erlang: bump to version 18.3

Erlang/OTP 18.3 is a service release on the 18 track with mostly bug
fixes, but is does contain a number of new features and improvements as
well.

Some highlights of the release are:

  . New statistics info about runnable and active processes & ports.
    Call erlang:statistics with: total_run_queue_lengths |
    run_queue_lengths | total_active_tasks | active_tasks.

  . Time warp improvements: dbg:p/2 and erlang:trace/3 with
    monotonic_timestamp |strict_monotonic_timestamp.

  . Introduced a validation callback for heart.

  . The module overload in sasl has been deprecated.

  . ~90 contributions since 18.2

Signed-off-by: Frank Hunleth <fhunleth@troodon-software.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>