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

[Artem Belevich via cfe-commits]

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@@ -0,0 +1,24 @@
+// REQUIRES: amdgpu-registered-target
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Artem-B wrote:

I've just checked using experimental target `csky-unknown-elf ` that's not enabled by default, and clang indeed errors out if we attempt to generate code, but works OK with `-fsyntax-only`. 

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