[clang] [Clang][AMDGPU] Accept builtins in lambda declarations (PR #135027)

[Shilei Tian via cfe-commits]

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@@ -27,7 +27,7 @@ bool SemaAMDGPU::CheckAMDGCNBuiltinFunctionCall(unsigned BuiltinID,
   // position of memory order and scope arguments in the builtin
   unsigned OrderIndex, ScopeIndex;
 
-  const auto *FD = SemaRef.getCurFunctionDecl();
+  const auto *FD = SemaRef.getCurFunctionDecl(true);
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shiltian wrote:

```suggestion
  const auto *FD = SemaRef.getCurFunctionDecl(/*AllowLambda=*/true);
```

https://github.com/llvm/llvm-project/pull/135027