Add tests to CMake project

Related to https://github.com/xiph/vorbis/issues/73.

Signed-off-by: Ralph Giles <giles@thaumas.net>
2 jobs for cmake-add-tests in 1 minute and 49 seconds (queued for 1 second)
latest
Status Job ID Name Coverage
  Build
passed autoconf #10967
docker

00:01:49

passed cmake #10968
docker

00:00:38