[llvm] [MC] Add support for -mcpu=native. (PR #159414)

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git-clang-format --diff origin/main HEAD --extensions cpp -- llvm/tools/llvm-mc/llvm-mc.cpp
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``````````diff
diff --git a/llvm/tools/llvm-mc/llvm-mc.cpp b/llvm/tools/llvm-mc/llvm-mc.cpp
index 1f95e0e80..62fd01441 100644
--- a/llvm/tools/llvm-mc/llvm-mc.cpp
+++ b/llvm/tools/llvm-mc/llvm-mc.cpp
@@ -467,7 +467,7 @@ int main(int argc, char **argv) {
     MCPU = std::string(llvm::sys::getHostCPUName());
 
     llvm::StringMap<bool> TargetFeatures = llvm::sys::getHostCPUFeatures();
-    for (auto const& [FeatureName, IsSupported] : TargetFeatures)
+    for (auto const &[FeatureName, IsSupported] : TargetFeatures)
       Features.AddFeature(FeatureName, IsSupported);
   }
 

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https://github.com/llvm/llvm-project/pull/159414