RFR: 8277977: Incorrect references to --enable-reproducible-builds in docs

[Maxim Kartashev]

Corrects spelling mistakes in the documentation and one configure script message.

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Commit messages:
 - 8277977: Incorrect references to --enable-reproducible-builds in docs

Changes: https://git.openjdk.java.net/jdk/pull/6609/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=6609&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8277977
  Stats: 3 lines in 3 files changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6609.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6609/head:pull/6609

PR: https://git.openjdk.java.net/jdk/pull/6609