message: Fix Travis CI failure
  Summary:
  Fix compilation error:
  EnumClinitAnalysis.cpp:208:73: error: no matching function for call to
  optimize_enums::EnumAttr::EnumAttr(<brace-enclosed initializer list>)
diff: @@ -13,7 +13,7 @@ namespace optimize_enums {
  struct EnumAttr {
  const uint32_t ordinal;
  - const DexString* name{nullptr}; // Builtin name for enums.
  + const DexString* name; // Builtin name for enums.
  };
  /*
  