clang-format: Avoid unnecessary break before lambda return type.

Before:
  auto aaaaaaaa = [](int i,  // break
                     int j)
                      -> int {
    return fffffffffffffffffffffffffffffffffffffff(i * j);
  };

After:
  auto aaaaaaaa = [](int i,  // break
                     int j) -> int {
    return fffffffffffffffffffffffffffffffffffffff(i * j);
  };

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@203562 91177308-0d34-0410-b5e6-96231b3b80d8