message: Reorder BranchTarget fields
  Summary: Avoid padding so that the class size is 16B instead of 24B.
diff: @@ -68,17 +68,17 @@ enum BranchTargetType {
  };
  struct BranchTarget {
  - BranchTargetType type;
  MethodItemEntry* src;
  + BranchTargetType type;
  // The key that a value must match to take this case in a switch statement.
  int32_t case_key;
  BranchTarget() = default;
  - BranchTarget(MethodItemEntry* src) : type(BRANCH_SIMPLE), src(src) {}
  + BranchTarget(MethodItemEntry* src) : src(src), type(BRANCH_SIMPLE) {}
  BranchTarget(MethodItemEntry* src, int32_t case_key)
  - : type(BRANCH_MULTI), src(src), case_key(case_key) {}
  + : src(src), type(BRANCH_MULTI), case_key(case_key) {}
  bool operator==(const BranchTarget& other) const;
  };
  