Rust

Fix clippy warnings #473

Job	Run time
build (ubuntu-latest, stable)	55s
build (ubuntu-latest, beta)	50s
Build fuzz targets	1m 10s
build (ubuntu-latest, nightly)	45s
coverage	1m 7s
bench	1m 9s
build (stable, macOS-latest)	43s
cross (i686-unknown-linux-gnu)	43s
doc	24s
features	3m 9s
cross (powerpc64-unknown-linux-gnu)	55s
msrv	1m 48s
msrv-read	1m 42s
rustfmt	7s
Run `debug_abbrev` fuzz target	5m 10s
Run `debug_aranges` fuzz target	5m 6s
Run `debug_info` fuzz target	5m 7s
Run `debug_line` fuzz target	5m 5s
Run `eh_frame` fuzz target	5m 10s
Run `eh_frame_hdr` fuzz target	5m 5s
	46m 10s

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