rungen won't print help message if multiple filters registered #5323
Description
If you invoke some_rungen_binary --help when multiple filters are registered, you get:
$ ./bin/host/test --help
Must specify --name if multiple filters are registered; registered filters are:
mat_mul2
mat_mul1
blur2
blur1
To actually see the help text you must select a filter:
$ ./bin/host/test --name=blur1 --help
Usage: test argument=value [argument=value... ] [flags]
Arguments:
...