RFR: 7062: Update to the Eclipse 2020-12 platform

[Jonah Graham]

On Thu, 17 Dec 2020 01:13:13 GMT, Jonah Graham <github.com+679236+jonahgraham at openjdk.org> wrote:

>> Also updating the babel bundles for the 2020-09 platform.
>
> releng/platform-definitions/platform-definition-2020-12/platform-definition-2020-12.target line 55:
> 
>> 53:             <unit id="org.eclipse.pde.feature.group" version="3.14.600.v20201202-1800"/>
>> 54:             <unit id="org.eclipse.platform.sdk" version="4.18.0.I20201202-1800"/>
>> 55:             <repository location="http://download.eclipse.org/releases/2020-12/"/>
> 
> Try using https:// to workaround the http -> https redirect issue at download.eclipse.org.

Sorry I had hoped the problem was only http to https redirects. We'll need webmaster at eclipse.org to fix it. My guess is the fix for https://bugs.eclipse.org/bugs/show_bug.cgi?id=569730 broke it, so you can follow along there. 

Sorry for the inconvenience.

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PR: https://git.openjdk.java.net/jmc/pull/185