The utility iterates through the tests in the suite, much like dotest
does, and prints all tests it found. So that it can set up the
environment properly, it needs to be called with a single argument - the
path to the lldb executable.
Right now it's not wired up to anything, but the idea is to call this
from the lldbtest lit format, to enable running tests with a finer
The main reason I do this as a separate utility (and not inside the test format)
is that importing our tests requires a lot of fiddling with the import path and
has a bunch of side effects (e.g., loading liblldb into the address space), and
I did not want to expose the main lit process to this.