runtime:cpu1: TestSecretCgo failures

```
#!watchflakes
default <- pkg ~ `runtime.+` && test == "TestSecretCgo"
```

Issue created automatically to collect these failures.

Example ([log](https://ci.chromium.org/b/8680430317265506593)):

=== RUN TestSecretCgo
=== PAUSE TestSecretCgo
=== CONT TestSecretCgo

— [watchflakes](https://go.dev/wiki/Watchflakes)

Start with the TestSecretCgo test in the runtime package and reproduce or inspect the failure using the linked CI log. Identify the missing failure details and determine the cause of the TestSecretCgo failure; done means the test passes reliably on the affected cpu1 builder.

Written by the indexing model from the issue text.