clang-format: Indent relative to the ./-> and not the function name.

Before:
  aaaaaaaaaaa     //
      .aaaa(      //
           bbbb)  // This is different ..
      .aaaa(      //
          cccc);  // .. from this.

After:
  aaaaaaaaaaa     //
      .aaaa(      //
          bbbb)   // This is identical ..
      .aaaa(      //
          cccc);  // .. to this.

llvm-svn: 234300