Fixes #30873

[dhuseby]

fixes the failing bitrig unit tests.

[rust-highfive]

r? @brson

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[dhuseby]

@brson the change in file src/libstd/lib.rs fixes deprecation warnings on all of the bsd platforms. I'm pretty sure that the dynamic_lib module is only used on Linux and Windows, but please double check me on that. Thanks!

[alexcrichton]

dynamic_lib is actually required on all platforms for the compiler as it's how we load plugins currently, so perhaps that could stick around?

[dhuseby]

@alexcrichton ah, i see this:

librustc_plugin/lib.rs:61:#![feature(dynamic_lib)]
librustc_plugin/load.rs:111:        use std::dynamic_lib::DynamicLibrary;
librustdoc/lib.rs:22:#![feature(dynamic_lib)]
librustdoc/plugins.rs:15:use std::dynamic_lib as dl;
librustdoc/test.rs:15:use std::dynamic_lib::DynamicLibrary;

is this what you're talking about?

[dhuseby]

let me remove that part from the patch.

[dhuseby]

@alexcrichton alright, i removed the conditional compile.

[alexcrichton]

@bors: r+ 5ecccb1 rollup