RFR: 8247872: Upgrade HarfBuzz to the latest 2.7.2 [v3]

[Phil Race]

On Thu, 5 Nov 2020 13:36:18 GMT, Magnus Ihse Bursie <ihse at openjdk.org> wrote:

>> Looks like the build on macOS via GitHub will be broken by this fix?
>
> @mrserb Good catch! Yes indeed, it looks like `range-loop-analysis` needs to be disabled for clang for Xcode 12 to not complain.

I added that to the disabled warnings .. now I suppose the actions will re-run but I don't see any sign of it yet.
Just that the results that were there are now gone.
A few thoughts on this 
- github sends so many messages that it is easy to miss the important ones
- using the default for github we are at the whim of when ever they switch and if this change
   had been pushed 6 weeks ago likely it would have passed until the day github upgraded.
- it also means passing a github build does not guarantee it will pass on the "official" toolchains.

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PR: https://git.openjdk.java.net/jdk/pull/993