[compiler-rt] [hwasan] Move __hwasan_thread_enter/__hwasan_thread_exit out of namespace (PR #72123)

[Florian Mayer via llvm-commits]

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@@ -561,4 +542,25 @@ void InstallAtExitCheckLeaks() {
 
 }  // namespace __hwasan
 
+using namespace __hwasan;
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fmayer wrote:

Is this only for `hwasanThreadList` and `BlockSignals`?

https://github.com/llvm/llvm-project/pull/72123