TTY/PTY Support

[ameily]

Some samples and traces will only work properly when the binary being run is connected to a TTY or PTY terminal. For example, the expected failure cases for bzip2 requires that stdout is a TTY/PTY, but we cannot emulate this yet so these tests currently pass.

We need a new configuration option to control how to run a trace within a terminal session with a TTY/PTY stdout, stderr, and stdin. We could potentially use the script command, although we would still want to capture stdout and stderr separately.