[clang] Fix erroneous `-Wmissing-prototypes` for Win32 entry points (PR #98105)

[Vlad Serebrennikov via cfe-commits]

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@@ -654,6 +654,9 @@ Improvements to Clang's diagnostics
 
 - Clang now shows implicit deduction guides when diagnosing overload resolution failure. #GH92393.
 
+- Clong no longer emits a no previous prototype warning for Win32 entry points under ``-Wmissing-prototypes``.
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Endilll wrote:

Putting "no previous prototype" in quotes should improve readability, too.

https://github.com/llvm/llvm-project/pull/98105