Fix handling of glob members in --no-private #2810

Job	Run time
test (no rustup)	1m 50s
test (stable)	5m 46s
test (1.26)	8m 3s
test (beta)	5m 48s
test (1.30)	6m 26s
test (nightly)	5m 44s
test (1.31)	6m 33s
test (1.36)	7m 57s
test (nightly, macos-11)	11m 5s
test (nightly, windows-2019)	10m 12s
test (1.39)	8m 14s
test (1.41)	7m 29s
deny / deny	12s
msrv / msrv	2m 30s
miri / miri	52s
release-dry-run / prepare	3s
tidy / tidy	53s
release-dry-run / build (aarch64-unknown-linux-gnu)	1m 6s
release-dry-run / build (aarch64-unknown-linux-musl)	1m 0s
release-dry-run / build (aarch64-apple-darwin, macos-11)	1m 33s
release-dry-run / build (aarch64-pc-windows-msvc, windows-2019)	3m 21s
release-dry-run / build (x86_64-unknown-linux-gnu)	40s
release-dry-run / build (x86_64-unknown-linux-musl)	54s
release-dry-run / build (x86_64-apple-darwin, macos-11)	1m 39s
release-dry-run / build (x86_64-pc-windows-msvc, windows-2019)	3m 52s
release-dry-run / build (x86_64-unknown-freebsd)	1m 20s
release-dry-run / build (universal-apple-darwin, macos-11)	2m 11s
	1h 47m 13s

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