Let the formatter be more restrictive for breaking around . and ->

Before:
aaaaaaaaaaaaaaa(aaaaaaaaa, aaaaaaaaa, aaaaaaaaaaaaaaaaaaaaaaa)
    .aaaaaaaaaaaaaaaaaa();

After:
aaaaaaaaaaaaaaa(aaaaaaaaa, aaaaaaaaa,
                aaaaaaaaaaaaaaaaaaaaaaa).aaaaaaaaaaaaaaaaaa();

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@173160 91177308-0d34-0410-b5e6-96231b3b80d8