[libc] [llvm] [libc][math][c23] Add hypotbf16 function (PR #183460)

[Muhammad Bassiouni via llvm-commits]

================
@@ -0,0 +1,22 @@
+//===-- Shared hypotbf16 function -------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIBC_SHARED_MATH_HYPOTBF16_H
----------------
bassiounix wrote:

```suggestion
#ifndef LLVM_LIBC_SHARED_MATH_HYPOTBF16_H
#define LLVM_LIBC_SHARED_MATH_HYPOTBF16_H
```

https://github.com/llvm/llvm-project/pull/183460