Update prebuilt Clang to r365631c1 from Android.

The version we had was segfaulting.

Bug: 132420445
Change-Id: Icb45a6fe0b4e2166f7895e669df1157cec9fb4e0
diff --git a/linux-x64/clang/include/llvm/CodeGen/MIRPrinter.h b/linux-x64/clang/include/llvm/CodeGen/MIRPrinter.h
index b95cf0f..a4b03a7 100644
--- a/linux-x64/clang/include/llvm/CodeGen/MIRPrinter.h
+++ b/linux-x64/clang/include/llvm/CodeGen/MIRPrinter.h
@@ -1,4 +1,4 @@
-//===- MIRPrinter.h - MIR serialization format printer --------------------===//
+//===- MIRPrinter.h - MIR serialization format printer ----------*- C++ -*-===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.