[jfx11u] RFR: 8263760: Update gradle to version 7.0.1 [v2]

[Johan Vos]

On Sun, 22 Aug 2021 11:32:58 GMT, Ambarish Rapte <arapte at openjdk.org> wrote:

>> There were two minor merge conflicts in `build.gradle` and one conflict in `gradle/wrapper/gradle-wrapper.properties` while cherry picking the change. 
>> And it also required similar changes to be made for project fxpackager. The [first commit](https://github.com/openjdk/jfx11u/pull/49/commits/7700a6d1a7c82df8fc269f1de6f3bd5119fb3397) is the original cherry pick and [second commit](https://github.com/openjdk/jfx11u/pull/49/commits/cea09bdfc96374ce00560c13e6730ab76f8b20e9) is the additional changes for fxpackager.
>> Verified the build on all three platforms with gradle 7.0.1 and apache ant 1.10.5
>
> Ambarish Rapte has updated the pull request incrementally with one additional commit since the last revision:
> 
>   use antpluginImplementation

Marked as reviewed by jvos (Reviewer).

Already did, but forgot to look at the results. Looks good to me. We might remove the fxpackager part, but it doesn't hurt being there either.

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PR: https://git.openjdk.java.net/jfx11u/pull/49