[ruby-cvs:78510] edb80dfe3e (master): add additional CF info for CI env

Koichi Sasada	2019-12-05 14:39:03 +0900 (Thu, 05 Dec 2019)

  New Revision: edb80dfe3e

  https://github.com/ruby/ruby/commit/edb80dfe3e

  Log:
    add additional CF info for CI env
    
    Introduce new RUBY_DEBUG option 'ci' to inform Ruby interpreter
    that an interpreter is running on CI environment.
    
    With this option, `rb_bug()` shows more information includes
    method entry information, local variables information for each
    control frame.

  Modified files:
    debug.c
    gc.c
    test/ruby/test_rubyoptions.rb
    vm_dump.c