RFR: 8279796: Fix typo: Constucts -> Constructs

[Weijun Wang]

Two edits.

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Commit messages:
 - Another year
 - year
 - Update DigestMD5Base.java
 - 8279796: Fix typo: Constucts -> Constructs

Changes: https://git.openjdk.java.net/jdk/pull/7147/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=7147&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8279796
  Stats: 4 lines in 2 files changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7147.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7147/head:pull/7147

PR: https://git.openjdk.java.net/jdk/pull/7147