[clang] [LifetimeSafety] Add missing origins stats for lifetime analysis (PR #166568)

[Gábor Horváth via cfe-commits]

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@@ -0,0 +1,33 @@
+//===- LifetimeStats.h - Miscellaneous statistics related to lifetime safety
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Xazax-hun wrote:

Nit: line break in the heading. 

https://github.com/llvm/llvm-project/pull/166568