erlang: update to version 19.3, add packages

erlang: update to version 19.3, add packages

New packages:
* erlang-tools: This Erlang/OTP package provides support for misc tools.
* erlang-reltool: This Erlang/OTP package provides support for release management.
* erlang-erl-interface: This Erlang/OTP package provides support for erlang interoperability with other languages.
* erlang-os_mon: This Erlang/OTP package provides the following services:
  - cpu_sup CPU load and utilization supervision
  - disksup Disk supervision
  - memsup Memory supervision
* erlang-xmerl: This Erlang/OTP package provides functions for exporting XML data to an external format

Signed-off-by: Arnaud Sautaux <arnaud.sautaux@infoteam.ch>