[clang] Allow the no_stack_protector attribute on local variables (PR #173311)

[Aaron Ballman via cfe-commits]

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+// RUN: %clang_cc1 -triple x86_64-apple-darwin -emit-llvm -o - %s | FileCheck %s
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AaronBallman wrote:

We should have a test case which uses the attribute and passes `-fstack-protector-all` to demonstrate the behavior.

https://github.com/llvm/llvm-project/pull/173311