Fix compilation of System.Net.Security.Native on Linux

[akoeplinger]

It was accidentally moved to a OSX/iOS-only conditional in #33970 but it should be built on Linux too.

@stephentoub any idea why this was green in #33970? are the tests which rely on System.Net.Security.Native only run in outerloop?

[stephentoub]

any idea why this was green in #33970? are the tests which rely on System.Net.Security.Native only run in outerloop?

It's certainly possible that all of our negotiate-related tests are outer loop. @davidsh?

In the future we should run outer loop tests on anything like this that impacts System.Net, as there's a fair amount of validation done in outer loop that's not done in inner loop, at least today.

[davidsh]

It's certainly possible that all of our negotiate-related tests are outer loop. @davidsh?

Linux specific ones are part of the 'runtime-libraries enterprise-linux' pipeline. It is neither innerloop or outerloop but a separate pipeline. It runs all the time for every PR but only those PRs that touch System.Net code.

But this problem described here sounds like a compilation error which should have been caught in the regular CI validation.

[akoeplinger]

@davidsh I see. The PR only touched the CMakeLists.txt file but not any of the source files so the pipeline didn't get triggered:

runtime/eng/pipelines/libraries/enterprise/linux.yml

Line 17 in bd192ae

- src/libraries/Native/Unix/System.Net.Security.Native/*

There were no compilation errors since building of the library was simply skipped.