Update cheatsheets

cargo-rustc

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# cargo rustc
+
+> Compile a Rust package. Similar to `cargo build`, but you can pass extra options to the compiler.
+> See `rustc --help` for all available options.
+> More information: <https://doc.rust-lang.org/cargo/commands/cargo-rustc.html>.
+
+- Build the package and pass options to `rustc`:
+
+`cargo rustc -- {{rustc_options}}`
+
+- Build artifacts in release mode, with optimizations:
+
+`cargo rustc --release`
+
+- Compile with architecture-specific optimizations for the current CPU:
+
+`cargo rustc --release -- -C target-cpu=native`
+
+- Compile with speed optimizations:
+
+`cargo rustc -- -C opt-level {{1|2|3}}`
+
+- Compile with [s]ize optimizations (`z` also turns off loop vectorization):
+
+`cargo rustc -- -C opt-level {{s|z}}`
+
+- Check if your package uses unsafe code:
+
+`cargo rustc --lib -- -D unsafe-code`
+
+- Build a specific package:
+
+`cargo rustc --package {{package}}`
+
+- Build only the specified binary:
+
+`cargo --bin {{name}}`