RFR: JDK-8307301: Update HarfBuzz to 7.2.0

[Phil Race]

On Fri, 5 May 2023 16:40:57 GMT, Harshitha Onkar <honkar at openjdk.org> wrote:

> Harfbuzz updated from 7.0.1 to 7.2.0.
> 
> Files changed -
> 
> - harfbuzz.md file updated
> - 1 newly added source file - hb-ot-var-cvar-table.hh
> - 73 modified source files
> 
> 
> Following testing was carried for the update and works as expected. 
> 
> 1. Client CI Testing
> 2. TextLayout related tests
> 3. Font2DTest in TextLayout mode
> 4. Manual Testing of Arabic, Hebrew, Thai, Indic languages on TextLayout. (Mac, Windows and Linux)

LGTM

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Marked as reviewed by prr (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/13835#pullrequestreview-1415178214