Tests

Rename SmallRng::from_thread_rng to from_rand_rng #1166

Job	Run time
Check doc	31s
test (ubuntu-latest, x86_64-unknown-linux-gnu, stable)	1m 7s
test (macos-latest, x86_64-apple-darwin, stable)	49s
test-ks	39s
test-cross (ubuntu-latest, powerpc-unknown-linux-gnu, stable)	1m 12s
test (windows-latest, x86_64-pc-windows-gnu, stable)	3m 2s
test-ios	21s
test (windows-latest, x86_64-pc-windows-msvc, beta)	1m 46s
test-miri	4m 40s
test (ubuntu-latest, x86_64-unknown-linux-gnu, MSRV, 1.61.0)	3m 4s
test (ubuntu-latest, sudo apt-get update ; sudo apt install gcc-multilib, i686-unknown-linux-gnu,...	1m 57s
test-no-std	13s
test (ubuntu-latest, x86_64-unknown-linux-gnu, nightly, minimal_versions)	1m 26s
	20m 47s

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