read: use const generics in `src/read/util.rs` #547

Job	Run time
bench	1m 6s
Build fuzz targets	1m 1s
build (ubuntu-latest, stable)	41s
coverage	1m 1s
build (ubuntu-latest, beta)	44s
cross (i686-unknown-linux-gnu)	38s
build (ubuntu-latest, nightly)	42s
doc	38s
cross (powerpc64-unknown-linux-gnu)	49s
build (stable, macOS-latest)	41s
features	2m 48s
msrv	1m 5s
msrv-read	56s
rustfmt	5s
Run `debug_abbrev` fuzz target	7s
Run `debug_aranges` fuzz target	6s
Run `debug_info` fuzz target	6s
Run `debug_line` fuzz target	9s
Run `eh_frame` fuzz target	5s
Run `eh_frame_hdr` fuzz target	4s
	13m 32s

Provide feedback