RFR: 8313856: Replace VLA with malloc in pango

[Ambarish Rapte]

On Mon, 7 Aug 2023 04:55:23 GMT, Jayathirth D V <jdv at openjdk.org> wrote:

> We should not use stack for array memory allocations in JNI.
> Updated pango.c to use malloc for arrays and release them at appropriate places.

LGTM

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Marked as reviewed by arapte (Reviewer).

PR Review: https://git.openjdk.org/jfx/pull/1202#pullrequestreview-1564630432