[clang] [clang] Implement __builtin_stdc_rotate_left, __builtin_stdc_rotate_right (PR #160259)

[NagaChaitanya Vellanki via cfe-commits]

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+// RUN: %clang_cc1 -fsyntax-only -verify %s
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chaitanyav wrote:

i set it to `x86_64-unknown-unknown 

https://github.com/llvm/llvm-project/pull/160259