erlang: bump to version 17.1

Erlang/OTP 17.1 is a service release on the 17 track with mostly bug
fixes, but it does contain a number of new features and characteristics
improvements as well.

Some highlights of the release are:
  - crypto: Add aes_cfb8 cypher to crypto:block_encrypt and block_decrypt.
  - diameter: Add result code counters for CEA, DWA, and DPA.
  - erts: The following built in functions in the erlang and binary modules
    now bump an appropriate amount of reductions and yield when out of
    reductions:
    binary_to_list/1, binary_to_list/3, bitstring_to_list/1,
    list_to_binary/1,
    iolist_to_binary/1, list_to_bitstring/1, binary:list_to_bin/1
  - hipe: Handle Maps instructions get_map_elements, put_map_assoc,
    put_map_exact in the HiPE native code compiler.
  - mnesia: The time for inserting locks for a transaction with large
    number of locks is reduced significantly.
  - ssh: Option max_sessions added to ssh:daemon/{2,3}.
  - stdlib: Add maps:get/3 to maps module. The function will return the
    supplied default value if the key does not exist in the map.

Signed-off-by: Frank Hunleth <fhunleth@troodon-software.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>