Automatically label Cranelift new-backend PRs as such
- "cranelift/wasm/**"
- "cranelift/wasmtests/**"
+"cranelift:area:aarch64":
+ - "cranelift/codegen/src/machinst/*"
+ - "cranelift/codegen/src/isa/aarch64/*"
+
"fuzzing":
- "crates/fuzzing/**"
- "fuzz/**"
