[jdk17] RFR: 8269148: Update minor GCC version in GitHub Actions pipeline

[Xin Liu]

On Tue, 22 Jun 2021 17:20:14 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> It seems Ubuntu had bumped the version for GCC, so GHA started to fail with e.g.:
> 
> 
> The following packages have unmet dependencies:
>  g++-10-s390x-linux-gnu : Depends: gcc-10-s390x-linux-gnu-base (= 10.2.0-5ubuntu1~20.04cross1) but 10.3.0-1ubuntu1~20.04cross1 is to be installed
>  gcc-10-s390x-linux-gnu : Depends: cpp-10-s390x-linux-gnu (= 10.2.0-5ubuntu1~20.04cross1) but 10.3.0-1ubuntu1~20.04cross1 is to be installed
>                           Depends: gcc-10-s390x-linux-gnu-base (= 10.2.0-5ubuntu1~20.04cross1) but 10.3.0-1ubuntu1~20.04cross1 is to be installed
> E: Unable to correct problems, you have held broken packages.
> Error: Process completed with exit code 100.
> 
> 
> I believe we should just update to `10.3.0-1ubuntu1~20.04`.
> 
> Additional testing:
>  - [x] GitHub Actions, package installation steps work
>  - [ ] GitHub Actions, the builds complete

Marked as reviewed by xliu (no project role).

Thanks for the explanation. The reason I ask because I guess we need to review every minor gcc updates in the future. 
For a sizeable c/c++ project, it indeed needs extra caution to bump tool-chains. 
LGTM.

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PR: https://git.openjdk.java.net/jdk17/pull/120