clang-format: Slightly adapt line break penalties.

Before:
  aaaaaaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaaaaaaa)
                               ->aaaaaaaaa());
After:
  aaaaaaaaaaaaaaaaaaaaaaaa(
      aaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaaaaaaa)->aaaaaaaaa());

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@188253 91177308-0d34-0410-b5e6-96231b3b80d8