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/Use.h b/linux-x64/clang/include/llvm/IR/Use.h
index 6d29d47..034ca2c 100644
--- a/linux-x64/clang/include/llvm/IR/Use.h
+++ b/linux-x64/clang/include/llvm/IR/Use.h
@@ -139,7 +139,7 @@
   const Use *getImpliedUser() const LLVM_READONLY;
 
   Value *Val = nullptr;
-  Use *Next;
+  Use *Next = nullptr;
   PointerIntPair<Use **, 2, PrevPtrTag, PrevPointerTraits> Prev;
 
   void setPrev(Use **NewPrev) { Prev.setPointer(NewPrev); }