message: Do not overwrite `this` in Inliner reg-alloc
  Summary: Downstream passes may rely on it being available.
diff: @@ -903,7 +903,9 @@ void MultiMethodInliner::shrink_method(DexMethod* method) {
  // too.
  auto before_features = get_features();
  - regalloc::graph_coloring::allocate({}, method);
  + auto config = regalloc::graph_coloring::Allocator::Config{};
  + config.no_overwrite_this = true; // Downstream passes may rely on this.
  + regalloc::graph_coloring::allocate(config, method);
  // After this, any CFG is gone.
  // Assume that dedup will run, so building CFG is OK.
  