RFR: 8297874: get_dump_directory() in jfrEmergencyDump.cpp should pass correct length to jio_snprintf

[Markus Grönlund]

On Tue, 10 Jan 2023 03:20:12 GMT, Calvin Cheung <ccheung at openjdk.org> wrote:

> Please review this simple fix for correcting the length passing to` jio_snprintf `in the `get_dump_directory()` function in `jfrEmergencyDump.cpp`.
> 
> Passed tiers 1 - 4 testing.

Marked as reviewed by mgronlun (Reviewer).

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PR: https://git.openjdk.org/jdk/pull/11916