[clang] [Clang][ARM] Only try to redefine builtins for non-CUDA (PR #128222)

[Artem Belevich via cfe-commits]

================
@@ -27,6 +27,8 @@
 extern "C" {
 #endif
 
+#if !defined(__CUDA_ARCH__)
+
----------------
Artem-B wrote:

@rnk Reid, would you happen to have an idea what's up with these builtins on Windows?

https://github.com/llvm/llvm-project/pull/128222