message: Make shared_ptr explicit
  Summary:
  Pull Request resolved:
  I heard that the old Travis GCC is unhappy with the emplace w/o `shared_ptr`.
diff: @@ -1402,7 +1402,7 @@ size_t MultiMethodInliner::get_inlined_cost(const DexMethod* callee) {
  always_assert(callees_analyzed > 0);
  inlined_cost = inlined_cost / callees_analyzed;
  m_inlined_costs_keyed.emplace(
  - callee, new std::unordered_map<std::string, size_t>(
  + callee, std::make_shared<std::unordered_map<std::string, size_t>>(
  inlined_costs_keyed.begin(), inlined_costs_keyed.end()));
  }
  TRACE(INLINE, 4, "[too_many_callers] get_inlined_cost %s: %u", SHOW(callee),
  