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/llvm/BinaryFormat/MsgPackReader.h b/linux-x64/clang/include/llvm/BinaryFormat/MsgPackReader.h
index 2d332f5..a6ae542 100644
--- a/linux-x64/clang/include/llvm/BinaryFormat/MsgPackReader.h
+++ b/linux-x64/clang/include/llvm/BinaryFormat/MsgPackReader.h
@@ -33,6 +33,7 @@
 #ifndef LLVM_SUPPORT_MSGPACKREADER_H
 #define LLVM_SUPPORT_MSGPACKREADER_H
 
+#include "llvm/Support/Error.h"
 #include "llvm/Support/MemoryBuffer.h"
 #include "llvm/Support/raw_ostream.h"
 #include <cstdint>
@@ -56,6 +57,7 @@
   Array,
   Map,
   Extension,
+  Empty, // Used by MsgPackDocument to represent an empty node
 };
 
 /// Extension types are composed of a user-defined type ID and an uninterpreted