This type of actions is used to change some parametter on GStreamer
core and it plugins, it can be fore example, to change the rank of a
plugin or things like that.
It is a random number, but it will in most cases give people a hint
that gst-validate reported a critical issue, and thus set the return
code, only by looking at it
Also make use of gst_validate_runner_print() in
gst-validate-transcoding.c as we were copy pasting that method there.