clang-format: Support breaking arguments of function type typedefs.

Before:
  typedef size_t (*aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa)(
      const aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa *aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);

After:
  typedef size_t (*aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa)(
      const aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa *
          aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@215631 91177308-0d34-0410-b5e6-96231b3b80d8