libtorrent4j-2.0.3-15

• using libtorrent master
• updated to OpenSSL 1.1.1k
• using android NDK r22b
• lt:add new torrent_file_with_hashes() which includes piece layers for
  creating .torrent files
• lt:use /etc/ssl/cert.pem to validate HTTPS trackers and web servers on
  MacOS
• lt:raise the severity of peers sending invalid messages to 'peer_error'.
  Simplify m_upload_only to just record the explicit upload-only state
  communicated via the extension message. Implied upload only is moved to
  the upload_only() query. Add simulations for peer connection tests.
  Mostly for have-all, have-none and bitfields, and some simple invalid
  requests. This will serve as a platform to add more sophisticated tests.
• lt:restore peer_connection::is_seed to not take m_have_all into account.
  It caused some regression in edge cases
• lt:add a file_prio_alert, posted when file priorities are applied
• lt:prefer __builtin_popcountl() over portable C implementation of
  popcnt. This enables the ARM64 SIMD instruction on Apple M1
• lt:fix issue with setting file priorities and saving resume data. The
  need-save-resume flag should not be set until after the new file
  priorities have been applied. Don't set the need-save-resume flag just
  by loading the resume data (when applying the file priorities into the
  piece priorities)
• lt:source code cleanup, performance and stability