298 fix build of version 0.9.5

[archeoss]

Resolves #298

Some additional info:

• Benchmark result with ahash crate:

----------------RESULTS-----------------
     reports total:            1112
     reports collected:        1112
     test duration:           1.086
     written total, MB:     100.089
     rate, MB/s:             92.145
     rate, recs/s          1023.741
     avg latency:           9.058ms

• Benchmark result in current version:

----------------RESULTS-----------------
     reports total:            1112
     reports collected:        1112
     test duration:           1.092
     written total, MB:     100.089
     rate, MB/s:             91.615
     rate, recs/s          1017.855
     avg latency:           9.105ms

• Copied version of aHash: 0.7.4(with added one typo fix as discussed inhere)

• About this test with hash matches:

  • Invoking cargo test without additional flags passes the test
  • Invoking RUSTFLAGS="-C target-feature=+aes,+ssse3" cargo test --target=x86_64-unknown-linux-musl fails the test (hashes don't match)
  • This behaviour is consistent with both copied version of ahash and with imported one from github using Cargo github import (faulty test or expected behaviour?)

[archeoss]

Some additional info:

sample tests:

hasher1.write(&(0..10).collect::<Vec<u8>>());
hasher2.write(&(245..255).collect::<Vec<u8>>());
hasher3.write(&(63..73).collect::<Vec<u8>>());
hasher4.write(&(101..111).collect::<Vec<u8>>());

Output without flags (different results for aHash v0.8.6 due to different keys):

ver.	1	2	3	4
aHash v.0.7.4	3604729491498336444	4698010058046694585	7892047681755360091	15822444892006722439
aHash v.0.7.6	3604729491498336444	4698010058046694585	7892047681755360091	15822444892006722439
aHash v.0.8.6	7715258586443628156	10697497720697129369	4211484261640213197	9763537285513611305

---

Output with RUSTFLAGS="-C target-feature=+aes,+ssse3" flags:

ver.	1	2	3	4
aHash v.0.7.4	16011136255442261133	2605215798843651484	6547545895333015968	6902404632462942265
aHash v.0.7.6	16011136255442261133	2605215798843651484	6547545895333015968	6902404632462942265
aHash v.0.8.6	15475331549103311308	7344361408891437224	13367513670482924484	4821293288195121582

---

Output with RUSTFLAGS="-C target-feature=+ssse3" flags:

ver.	1	2	3	4
aHash v.0.7.4	3604729491498336444	4698010058046694585	7892047681755360091	15822444892006722439
aHash v.0.7.6	3604729491498336444	4698010058046694585	7892047681755360091	15822444892006722439
aHash v.0.8.6	7715258586443628156	10697497720697129369	4211484261640213197	9763537285513611305

Conclusion: aHash results dependent on aes flag

[ikopylov]

Please, fix a warning in src/blob/index/mod.rs: unused import: 'crate::prelude::*'

[ikopylov]

LGTM