Fixed crash in `EglGetProcAddress` on Win32-x86 platform

[varphone]

• [x] Tested on all platforms changed
• [x] Added an entry to CHANGELOG.md if knowledge of this change could be valuable to users
• [x] Updated documentation to reflect any user-facing changes, including notes of platform-specific behavior
• [x] Created or updated an example program if it would help users understand this functionality

Summary

Change the calling convention of the EglGetProcAddress declaration to extern "system" to automatically use the correct calling convention for the platform.

Details

The EglGetProcAddress function uses the stdcall calling convention on the Win32-x86 platform, but it was previously declared as extern "C" in the code.

On the Win32-x86 platform, extern "C" functions use the cdecl calling convention by default.

This mismatch in calling conventions caused a crash.

By changing the declaration to extern "system", the correct calling convention for the platform will be used automatically, preventing the crash.

Testing

• Verified that the application no longer crashes on the Win32-x86 platform.
• Ensured that the change does not affect other platforms.

[varphone]

Could you add a changelog entry for that? should be fine after that.

Already added, please review again.

[MarijnS95]

In general I'm not a fan of "Fixed crash" or other context-less titles using the word "fix", can we come up with anything more descriptive (i.e. "use the correct calling convention for EglGetProcAddress() on Win32-x86 (optionally: preventing a crash)")? Same for the PR title.

Probably not a requirement to merge though, depending on what Kirill thinks of this.