win,node-gyp: enable delay-load hook by default

The delay-load hook allows node.exe/iojs.exe to be renamed. See efadffe8
for more background.

This commit is a combined squash of the following previous patches:
ba93c583,
3bda6cbf,
0d6d3dda.

PR-URL: https://github.com/nodejs/io.js/pull/1763


Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>