clang-format: Prefer breaking after return type over template param

Before:
  typename aaaaaaaaaa<aaaaaa>::aaaaaaaaaaa aaaaaaaaaa<
      aaaaaa>::aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(bool *aaaaaaaaaaaaaaaaaa,
                                                   bool *aa) {}

After:
  typename aaaaaaaaaa<aaaaaa>::aaaaaaaaaaa
  aaaaaaaaaa<aaaaaa>::aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(
      bool *aaaaaaaaaaaaaaaaaa, bool *aa) {}

llvm-svn: 215693