[jdk11u-dev] RFR: 8276550: Use SHA256 hash in build.tools.depend.Depend

[Aleksey Shipilev]

Clean backport for consistency with other releases. I don't think you can bootstrap 11u with non-MD5-carrying JDK just yet, because MD5 is still a requirement for `MessageDigest`. But, that might change in future, as FIPS compliance requires dropping weaker and weaker hashing schemes.

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Commit messages:
 - Backport afb502e28a81183cef76a7e60fc052e8cad3afe3

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/611/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=611&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8276550
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/611.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/611/head:pull/611

PR: https://git.openjdk.java.net/jdk11u-dev/pull/611