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

[Guru Hb]

On Mon, 21 Sep 2020 12:22:50 GMT, Marcus Hirt <hirt at openjdk.org> wrote:

>> 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

Marked as reviewed by ghb (Reviewer).

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