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/IR/Constant.h b/linux-x64/clang/include/llvm/IR/Constant.h
index e71ac27..9315766 100644
--- a/linux-x64/clang/include/llvm/IR/Constant.h
+++ b/linux-x64/clang/include/llvm/IR/Constant.h
@@ -90,6 +90,10 @@
   /// elements.
   bool containsUndefElement() const;
 
+  /// Return true if this is a vector constant that includes any constant
+  /// expressions.
+  bool containsConstantExpression() const;
+
   /// Return true if evaluation of this constant could trap. This is true for
   /// things like constant expressions that could divide by zero.
   bool canTrap() const;