RFR: 8320410: Reflow markdown in building.md

[Erik Joelsson]

On Mon, 20 Nov 2023 14:34:51 GMT, Magnus Ihse Bursie <ihse at openjdk.org> wrote:

> Reflow the markdown in building.md so line lengths of 80 is respected, wherever possible. 
> 
> Note that is is correct that the building.html file is unchanged (and indeed a sign that only markdown line breaks have been modified).

Marked as reviewed by erikj (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/16737#pullrequestreview-1740054347