Mute status messages unless --verbose is used

[wsfulton]

This removes random noise appearing in the output when abi3audit is used in parallel jobs maxing out all cpus. For example, we're seeing things like: "🕛 : _director_template.abi3.so: analyzing symbols" sometimes appearing, but not always. This pull requests allows one to keep seeing this kind of extraneous output when using the --verbose option.