RPM build fix (reverted CI changes which will need to be un-reverted or made conditional) and vendor Rust dependencies to make builds much faster in any CI system.

zeroidc/vendor/wasm-bindgen/guide/src/examples/performance.md

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+# web-sys: `performance.now`
+
+[View full source code][code] or [view the compiled example online][online]
+
+[online]: https://rustwasm.github.io/wasm-bindgen/exbuild/performance/
+[code]: https://github.com/rustwasm/wasm-bindgen/tree/master/examples/performance
+
+Want to profile some Rust code in the browser? No problem! You can use the
+`performance.now()` API and friends to get timing information to see how long
+things take.
+
+## `src/lib.rs`
+
+```rust
+{{#include ../../../examples/performance/src/lib.rs}}
+```