Add glibc 2.28 releases #1862

Job	Run time
check	1m 10s
fuzz record_ref	6m 47s
fuzz select_query	8m 20s
cross x86_64-unknown-linux-gnu (stable)	1m 15s
cross x86_64-unknown-linux-gnu (beta)	1m 20s
cross x86_64-unknown-linux-gnu (nightly)	1m 55s
cross x86_64-unknown-linux-musl (stable)	1m 39s
cross aarch64-unknown-linux-gnu (stable)	1m 23s
cross aarch64-unknown-linux-musl (stable)	1m 36s
test x86_64-unknown-linux-gnu (stable)	1m 19s
test x86_64-unknown-linux-gnu (beta)	1m 17s
test x86_64-unknown-linux-gnu (nightly)	2m 9s
test x86_64-apple-darwin (stable)	1m 36s
test x86_64-apple-darwin (beta)	1m 37s
test x86_64-apple-darwin (nightly)	2m 51s
test x86_64-pc-windows-gnu (stable)	2m 44s
test i686-pc-windows-msvc (stable)	2m 30s
fmt	25s
audit	2m 40s
book	3m 8s
clippy	1m 7s
deny	49s
miri	1m 59s
upgrades	1m 42s
gh-pages	4m 50s
	58m 8s

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