Add smaps tagging for V8 memory allocation

[tasunnn]

Add smaps tag for V8 memory allocation

This change utilizes the prctl system call to assign names to anonymous
memory regions allocated by V8 on Linux and Android. This allows for
easier identification of V8-specific memory in /proc/pid/smaps,
improving memory debugging and analysis capabilities.

bug: 485648080

[github-actions]

🤖 Gemini Suggested Commit Message

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starboard: Tag V8 memory regions for smaps

This change utilizes the prctl system call to assign names to anonymous
memory regions allocated by V8 on Linux and Android. This allows for
easier identification of V8-specific memory in /proc/pid/smaps,
improving memory debugging and analysis capabilities.

Bug: 485648080

---

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[gemini-code-assist]

Code Review

The pull request introduces changes to v8/src/base/platform/platform-starboard.cc to add smaps v8 tagging. This involves including <sys/prctl.h> and using prctl to set the anonymous name for allocated memory regions on Android and Linux. The changes appear to be correct and follow the intended functionality.