Add node 4.6.0, remove node 4.4.7
Add node 4.6.0, remove node 4.4.7

source url: https://nodejs.org/dist/v4.6.0/node-v4.6.0.tar.gz, source sha256: 0838f12e329edb252e6e6baddca85632bf5ff2ec900e737e88f9bf9b38946b1b

[#131225127]

Signed-off-by: Sam Smith <03a07629efb0a02c7bbe7cc340a4243da1ab861a@gmail.com>

cloudfoundry/nodejs-buildpack,karthikeyabhaghavatula/nodejs_buildpack,oocl-ncc-itm/nodejs-buildpack,kauffecup/nodejs-buildpack,kauffecup/nodejs-buildpack,karthikeyabhaghavatula/nodejs_buildpack,roder/nodejs-buildpack,ks2software/nodejs-buildpack,pkumar-appd/nodejs-buildpack,oocl-ncc-itm/nodejs-buildpack,ks2software/nodejs-buildpack,roder/nodejs-buildpack,pkumar-appd/nodejs-buildpack,pkumar-appd/nodejs-buildpack,karthikeyabhaghavatula/nodejs_buildpack,ks2software/nodejs-buildpack,kauffecup/nodejs-buildpack,ks2software/nodejs-buildpack,roder/nodejs-buildpack,cloudfoundry/nodejs-buildpack,NSWIDER/nodejs-oracle-buildpack,ks2software/nodejs-buildpack,NSWIDER/nodejs-oracle-buildpack,NSWIDER/nodejs-oracle-buildpack,oocl-ncc-itm/nodejs-buildpack,ks2software/nodejs-buildpack,cloudfoundry/nodejs-buildpack,cloudfoundry/nodejs-buildpack,ks2software/nodejs-buildpack