RFR: JDK-8282532: Allow explicitly setting build platform alongside --openjdk-target [v10]

[Julian Waters]

On Fri, 4 Mar 2022 07:51:36 GMT, Julian Waters <jwaters at openjdk.org> wrote:

>> Currently the only other option for manually configuring the build platform while cross compiling are devkits, which don't work on certain systems and are also more focused on differentiating the build and target compilers instead. This patch adds the ability to explicitly set the build platform through a new option, which can be especially helpful for when autodetection fails and devkits cannot be relied on, and also for simpler cross compilation cases (Like the one described in building.md)
>> 
>> WIP: Translation from markdown to html
>
> Julian Waters has updated the pull request incrementally with two additional commits since the last revision:
> 
>  - Manual revert again, I swear I'm using the correct pandoc version, I'm confused as to why this is happening
>  - I think I'm beginning to hate pandoc :(

I think I'll go with the rebasing option, don't really want to cause you any more trouble than I already have. Thanks for taking the time, I really appreciate it :)
> This still looks weird. I'm beginning to feel sorry for you and all your troubles. :-(

haha, I don't really mind having to deal with all the issues that I faced when trying to do this PR, I'm honestly more worried that I'm making a fool of myself in front of everyone here given how messy the branch has become :(

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PR: https://git.openjdk.java.net/jdk/pull/7656