Add node 6.11.4, remove node 6.11.3
Add node 6.11.4, remove node 6.11.3

source url: https://nodejs.org/dist/v6.11.4/node-v6.11.4.tar.gz
source sha256: 94557aa1b9adaa71a424eb7efe8877d7e65bda6e496350c4bac5f64ec715bb1c

[#151659499]

cloudfoundry-community/asp.net5-buildpack