[clang-tools-extra] [clang-tidy] Add deprecated-posix-functions check (PR #195641)

[Daniil Dudkin via cfe-commits]

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@@ -0,0 +1,91 @@
+// RUN: %check_clang_tidy %s portability-deprecated-posix-functions %t
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unterumarmung wrote:

`--std=c++98-or-later`?

https://github.com/llvm/llvm-project/pull/195641