RFR: 7205: Correct URL for Oracle's JMC production binaries

[Aurelio Garcia-Ribeyro]

7205: Correct URL for Oracle's JMC production binaries

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Commit messages:
 - Changed Oracle URL to a non-versioned URL
 - Corrected URL for Oracle's JMC production binaries

Changes: https://git.openjdk.java.net/jmc/pull/216/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jmc&pr=216&range=00
  Issue: https://bugs.openjdk.java.net/browse/JMC-7205
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jmc/pull/216.diff
  Fetch: git fetch https://git.openjdk.java.net/jmc pull/216/head:pull/216

PR: https://git.openjdk.java.net/jmc/pull/216