RFR: 8279958: Provide configure hints for Alpine/apk package managers

[Aleksey Shipilev]

On Thu, 13 Jan 2022 12:02:33 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> Our build system provides helpful hints about the packages to install to resolve the build-time dependencies. It can be amended to include Alpine/apk package managers. Noticed this when trying to build mainline OpenJDK on Alpine 3. 
> 
> Additional testing:
>  - [x] Was able to build on clean Alpine 3 with these hints

Since this is a simple change and at least one build system maintainer acked this, I am integrating.

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PR: https://git.openjdk.java.net/jdk/pull/7064