RFR: 8252191: Update to gcc 10.2 on Linux

Tue Oct 6 13:17:10 UTC 2020

On Tue, 6 Oct 2020 12:59:39 GMT, Johan Vos <jvos at openjdk.org> wrote:

>> This patch updates the compiler to gcc 10.2 on Linux, in order to match JDK 16 -- see
>> [JDK-8253616](https://bugs.openjdk.java.net/browse/JDK-8253616).
>> I ran a full build and test, including media and WebKit.
>
> Marked as reviewed by jvos (Reviewer).

> What OS are you using? (I'm running a test on Ubuntu 18.04)

I also have 18.04.

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

PR: https://git.openjdk.java.net/jfx/pull/311