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/Bitcode/BitcodeWriter.h b/linux-x64/clang/include/llvm/Bitcode/BitcodeWriter.h
index 39061e0..7ad2d37 100644
--- a/linux-x64/clang/include/llvm/Bitcode/BitcodeWriter.h
+++ b/linux-x64/clang/include/llvm/Bitcode/BitcodeWriter.h
@@ -17,6 +17,7 @@
 #include "llvm/IR/ModuleSummaryIndex.h"
 #include "llvm/MC/StringTableBuilder.h"
 #include "llvm/Support/Allocator.h"
+#include "llvm/Support/MemoryBuffer.h"
 #include <map>
 #include <memory>
 #include <string>
@@ -46,7 +47,7 @@
 
   public:
     /// Create a BitcodeWriter that writes to Buffer.
-    BitcodeWriter(SmallVectorImpl<char> &Buffer);
+    BitcodeWriter(SmallVectorImpl<char> &Buffer, raw_fd_stream *FS = nullptr);
 
     ~BitcodeWriter();
 
@@ -151,6 +152,19 @@
                         const std::map<std::string, GVSummaryMapTy>
                             *ModuleToSummariesForIndex = nullptr);
 
+  /// If EmbedBitcode is set, save a copy of the llvm IR as data in the
+  ///  __LLVM,__bitcode section (.llvmbc on non-MacOS).
+  /// If available, pass the serialized module via the Buf parameter. If not,
+  /// pass an empty (default-initialized) MemoryBufferRef, and the serialization
+  /// will be handled by this API. The same behavior happens if the provided Buf
+  /// is not bitcode (i.e. if it's invalid data or even textual LLVM assembly).
+  /// If EmbedCmdline is set, the command line is also exported in
+  /// the corresponding section (__LLVM,_cmdline / .llvmcmd) - even if CmdArgs
+  /// were empty.
+  void EmbedBitcodeInModule(Module &M, MemoryBufferRef Buf, bool EmbedBitcode,
+                            bool EmbedCmdline,
+                            const std::vector<uint8_t> &CmdArgs);
+
 } // end namespace llvm
 
 #endif // LLVM_BITCODE_BITCODEWRITER_H