Unbreak all features test

[lu-zero]

Fixes #1987

[eclipseo]

I've tested this locally on rav1e 0.2.0 and src/api/context.rs tests still segfaults when tracing is enabled.

Might be related to rust-lang/rust#45599

[lu-zero]

I would land this and document that using all-features in general is discouraged.

[shssoichiro]

Agreed, we have some features that don't necessarily play nicely together. Many of our features are specifically for debugging. If you want a fully featured binary, the default feature set gives you that.

[lu-zero]

I landed the useful commit on the other PR, this one can be closed pending upstream decision regarding the right cfg tag.

[eclipseo]

Agreed, we have some features that don't necessarily play nicely together. Many of our features are specifically for debugging. If you want a fully featured binary, the default feature set gives you that.

Thank you I will listen to that advice.