Hi, all.
I met a strange problem that kunit run 0 tests in Debian9.
Env:
```
root@lkp-hsw-ep4 ~/linus# head /etc/os-release
PRETTY_NAME="Debian GNU/Linux 9 (stretch)"
NAME="Debian GNU/Linux"
VERSION_ID="9"
VERSION="9 (stretch)"
ID=debian
root@lkp-hsw-ep4 ~/linus# uname -r
5.6.0
```
Reproduce: Just run `./tools/testing/kunit/kunit.py run --defconfig`
```
root@lkp-hsw-ep4 ~/linus# ./tools/testing/kunit/kunit.py run --defconfig
[13:41:30] Building KUnit Kernel ...
[13:41:33] Starting KUnit Kernel ...
[13:41:33] ============================================================
[13:41:33] Testing complete. 0 tests run. 0 failed. 0 crashed.
[13:41:33] Elapsed time: 2.619s total, 0.002s configuring, 2.610s
building, 0.007s running
root@lkp-hsw-ep4 ~/linus# cat .kunitconfig
CONFIG_KUNIT=y
CONFIG_KUNIT_TEST=y
CONFIG_KUNIT_EXAMPLE_TEST=y
```
As doc said, looks like everything worked correctly. But kunit run 0 tests.
```
If everything worked correctly, you should see the following:
Generating .config ...
Building KUnit Kernel ...
Starting KUnit Kernel ...
```
--
Best regards.
Liu Yiding
