RFR: 6909: Upgrade to Eclipse 2020-09 [v2]

Mon Sep 21 12:22:50 UTC 2020

> Adds the Eclipse 2020-09 platform, upgrades 2020-09 and 2020-06 to use the 2020-06 babel bundles, and sets 2020-09 to
> be the default.

Marcus Hirt has updated the pull request incrementally with one additional commit since the last revision:

  Trying using JDK 11 to launch

-------------

Changes:
  - all: https://git.openjdk.java.net/jmc/pull/111/files
  - new: https://git.openjdk.java.net/jmc/pull/111/files/366b8405..260ae180

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jmc&pr=111&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jmc&pr=111&range=00-01

  Stats: 12 lines in 1 file changed: 12 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jmc/pull/111.diff
  Fetch: git fetch https://git.openjdk.java.net/jmc pull/111/head:pull/111

PR: https://git.openjdk.java.net/jmc/pull/111