non-regression: add the --no-comparison option
non-regression: add the --no-comparison option

If the --no-comparison option is specified, the test doesn't exit with non-zero
code if the comparison of the generated ROHC packets with a reference is not
possible (eg. option -c not specified).

didier-barvaux/rohc,didier-barvaux/rohc,didier-barvaux/rohc,didier-barvaux/rohc,didier-barvaux/rohc