RFR: 8324880: Rename get_stack_trace.h

[Julian Waters]

On Tue, 30 Jan 2024 03:43:15 GMT, Kim Barrett <kbarrett at openjdk.org> wrote:

> Please review this trivial change that renames the file
> test/hotspot/jtreg/serviceability/jvmti/thread/GetStackTrace/get_stack_trace.h
> to get_stack_trace.hpp, and renames uses of NULL in that file.
> 
> The updates to #include lines in using files were performed mechanically.
> 
> Testing: mach5 tier1

Marked as reviewed by jwaters (Committer).

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PR Review: https://git.openjdk.org/jdk/pull/17623#pullrequestreview-1850791401