[flang] [lld] [mlir] [llvm] [libcxx] [clang] [analyzer][NFC] Cleanup BugType lazy-init patterns (PR #76655)

[Balazs Benics via cfe-commits]

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@@ -52,10 +52,13 @@ class SimpleStreamChecker : public Checker<check::PostCall,
                                            check::PreCall,
                                            check::DeadSymbols,
                                            check::PointerEscape> {
-  CallDescription OpenFn, CloseFn;
+  const CallDescription OpenFn{{"fopen"}, 2};
+  const CallDescription CloseFn{{"fclose"}, 1};
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steakhal wrote:

Well, it seems like `StringRef` is not constexpr for some reason - and I'm using that inside.
Consequently, that's a blocker.

https://github.com/llvm/llvm-project/pull/76655