Prefer to break after operators over breaking after "(".

Before:
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(
    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa && aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);

After:
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa &&
                                 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@171386 91177308-0d34-0410-b5e6-96231b3b80d8