[tools] ship openssl headers under 'include/node'
[tools] ship openssl headers under 'include/node'

some native module 'nodegit' depends on the relative
path to configure correctly

Ref #6869

nwjs/nw.js,nwjs/nw.js,nwjs/nw.js,nwjs/nw.js,nwjs/nw.js,nwjs/nw.js