clang-format: [JS] Avoid bad line-warp around "function".

Before:
  someLooooooooongFunction(
      aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa,
      aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa, function(
                                              aaaaaaaaaaaaaaaaaaaaaaaaaaaaa) {
        // code
      });

After:
  someLooooooooongFunction(
      aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa,
      aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa,
      function(aaaaaaaaaaaaaaaaaaaaaaaaaaaaa) {
        // code
      });

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@236813 91177308-0d34-0410-b5e6-96231b3b80d8