Parallel test suite execution causes tests to fail

[enter-github-username]

Running the test suite (the files in c-examples/simple, which are executed when running make check) in parallel via the -j<number of tests to run in parallel> flag of make (check) currently leads to test failures. This is caused by a inter-test dependency, as the tests are dependent on the genber test to generate the pr.ber file. If the genber test is not yet finished, the other tests fail.

A solution, if this behavior is not intended, might be to generate the pr.ber file as part of the actual build process and not inside a seperate executable, which is only executed when the test suite is already running.

[apconole]

Thanks for the report - when I get a chance, I'll look into it