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-c/BitReader.h b/linux-x64/clang/include/llvm-c/BitReader.h
index b307ee9..012c0e6 100644
--- a/linux-x64/clang/include/llvm-c/BitReader.h
+++ b/linux-x64/clang/include/llvm-c/BitReader.h
@@ -19,11 +19,10 @@
 #ifndef LLVM_C_BITREADER_H
 #define LLVM_C_BITREADER_H
 
+#include "llvm-c/ExternC.h"
 #include "llvm-c/Types.h"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+LLVM_C_EXTERN_C_BEGIN
 
 /**
  * @defgroup LLVMCBitReader Bit Reader
@@ -78,8 +77,6 @@
  * @}
  */
 
-#ifdef __cplusplus
-}
-#endif
+LLVM_C_EXTERN_C_END
 
 #endif