[node] include gyp in gclient sync.

Windows toolchain still needs relies on gyp.

R=sergiyb@chromium.org

Bug: v8:6105, chromium:826218
Change-Id: If7fba3cf986daa23a748681c3e6f1527af68b622
Reviewed-on: https://chromium-review.googlesource.com/980494Reviewed-by: Sergiy Byelozyorov <sergiyb@chromium.org>
Commit-Queue: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52259}

tools/node/fetch_deps.py

@@ -37,7 +37,6 @@ GCLIENT_SOLUTION = [
       "v8/third_party/catapult"               : None,
       "v8/third_party/colorama/src"           : None,
       "v8/third_party/instrumented_libraries" : None,
-      "v8/tools/gyp"                          : None,
       "v8/tools/luci-go"                      : None,
       "v8/tools/swarming_client"              : None,
     },