Add node 8.11.0, remove node 8.9.4
Add node 8.11.0, remove node 8.9.4

source url: https://nodejs.org/dist/v8.11.0/node-v8.11.0.tar.gz
source sha256: 7683a674259298fc53dd020e210d062aaf02698980fe293c64ed2daee13466a4

[#156350231]

cloudfoundry/nodejs-buildpack,cloudfoundry/nodejs-buildpack,cloudfoundry/nodejs-buildpack,cloudfoundry/nodejs-buildpack