bpf-program: check if a trivial BPF program can be created and loaded

bpf-program: check if a trivial BPF program can be created and loaded

Re-introduce the check dropped by
ec3c5cfac74e8361a3b0153cc9e8cfdbbcbde0c6,
ad446c8ceb97c03971f06fd43e97720afe33be5a.

For some reasons, if we are running on LXC, even if bpf_program_supported()
returned true, but bpf_program_load_kernel() failed:
```
Attaching device control BPF program to cgroup /system.slice/test-bpf-devices-875b406d56ac7bc3.scope/186c411f6e991777 failed: Operation not permitted
src/test/test-bpf-devices.c:31: Assertion failed: Expected "r" to succeed, but got error: Operation not permitted
```