RFR: 8256393: Github Actions build on Linux should define OS and GCC versions

[Aleksey Shipilev]

On Mon, 16 Nov 2020 13:34:58 GMT, Robin Westberg <rwestberg at openjdk.org> wrote:

>> .github/workflows/submit.yml line 91:
>> 
>>> 89: 
>>> 90:       - name: Build jtreg
>>> 91:         run: sh make/build-all.sh ${JAVA_HOME_8_X64}
>> 
>> What is this change?
>
> On ubuntu-20.04 the default Java installation is now set to 11, but jtreg still requires Java 8 for building.

I see! Okay then.

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PR: https://git.openjdk.java.net/jdk/pull/1225