Don't chdir just to do a glob
erlang: support 17.0 release candidates

- build 17.0 via --devel and feature flags
- optional features incl sctp, dirty schedulers, native libraries
- support wx modules incl observer using updated wxmac formula
- skip ODBC patch for head and devel as upstream has included it
- fix dialyzer test path for stable builds
- unset ERL_* compiler environment variables to avoid failed builds
erlang: update R16B03-1 bottle.