Update prebuilt Clang to r416183b from Android.

https://android.googlesource.com/platform/prebuilts/clang/host/
linux-x86/+/06a71ddac05c22edb2d10b590e1769b3f8619bef

clang 12.0.5 (based on r416183b) from build 7284624.

Change-Id: I277a316abcf47307562d8b748b84870f31a72866
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
diff --git a/linux-x64/clang/include/clang-tidy/llvm/HeaderGuardCheck.h b/linux-x64/clang/include/clang-tidy/llvm/HeaderGuardCheck.h
new file mode 100644
index 0000000..23f12fd
--- /dev/null
+++ b/linux-x64/clang/include/clang-tidy/llvm/HeaderGuardCheck.h
@@ -0,0 +1,40 @@
+//===--- HeaderGuardCheck.h - clang-tidy ------------------------*- 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_CLANG_TOOLS_EXTRA_CLANG_TIDY_LLVM_HEADERGUARDCHECK_H
+#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_LLVM_HEADERGUARDCHECK_H
+
+#include "../utils/HeaderGuard.h"
+
+namespace clang {
+namespace tidy {
+namespace llvm_check {
+
+/// Finds and fixes header guards that do not adhere to LLVM style.
+/// For the user-facing documentation see:
+/// http://clang.llvm.org/extra/clang-tidy/checks/llvm-header-guard.html
+/// The check supports these options:
+///   - `HeaderFileExtensions`: a semicolon-separated list of filename
+///     extensions of header files (The filename extension should not contain
+///     "." prefix). ";h;hh;hpp;hxx" by default.
+///
+///     For extension-less header files, using an empty string or leaving an
+///     empty string between ";" if there are other filename extensions.
+class LLVMHeaderGuardCheck : public utils::HeaderGuardCheck {
+public:
+  LLVMHeaderGuardCheck(StringRef Name, ClangTidyContext *Context);
+
+  bool shouldSuggestEndifComment(StringRef Filename) override { return false; }
+  std::string getHeaderGuard(StringRef Filename, StringRef OldGuard) override;
+};
+
+} // namespace llvm_check
+} // namespace tidy
+} // namespace clang
+
+#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_LLVM_HEADERGUARDCHECK_H