* siri/make/default-outdir/ERL-438/OTP-14489:
  [ct_make] Do not use the interactive tool 'c' from ct_make
  Use current dir as default outdir for c:c/1,2
  [make] Do not use the interactive tool 'c' from make

* dgud/stdlib/string-len-compat/OTP-14487:
  Fix old length usage in string

In OTP-20, c:c/1,2 started using the directory of the source file as
default output directory. For backwards compatibility reasons this is
now reversed so the current directory is used instead.

Do not invoke the internal string:lenght/1 function
when the list length is wanted.

Fixes backwards compatibility for old string functions.

Add a few more tests to the proc_lib_SUITE.

The `error_logger_format_depth` variable is `unlimited` by default.
This can cause errors when logging crash reports using sasl logger,
because `io_lib:format("~P"...` does not support `unlimited` as a
depth parameter.
Use formatter string "~p" for unlimited depth.

A way to reproduce the error:
Start erl with sasl logger:
    erl -boot start_sasl -sasl errlog_type error -sasl sasl_error_logger tty

Report arbitrary error:
    error_logger:error_report(crash_report, [fake_crash_report, foo]).