* gnu/packages/node.scm (node): Update to 8.9.1.
[source]: Apply 'node-test-http2-server-rst-stream.patch'.
[arguments]: Skip 'doc-only' target in 'check', which attempts to use
npm to retrieve 'js-yaml' package. Remove test/doctool/test-make-doc.js.
Do not remove now-missing test case. Remove new test case that fails in
containers due to networking.
* gnu/packages/patches/node-test-http2-server-rst-stream.patch: New file.
Signed-off-by: Ludovic Courtès <ludo@gnu.org>