This adds support for lldb as a debugger so that tests can be run under lldb like this: $ make test-all TESTS=test/some_test.rb RUNRUBYOPT=--debugger=lldb git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63921 b2dd03c8-39d4-4d8f-98ff-823fe69b080e