[clang] [compiler-rt] [ubsan] Limit _BitInt ubsan tests to x86-64 platform only (PR #104494)

[Vitaly Buka via cfe-commits]

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@@ -1,3 +1,4 @@
+// REQUIRES: x86_64-target-arch
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vitalybuka wrote:

What is about 
https://lab.llvm.org/buildbot/#/builders/107/builds/1916

https://github.com/llvm/llvm-project/pull/104494