Fix broken links generated from Node modules in DevTools

[ghostoy]

Compiled scripts from Node were set to weak, which caused the script
object in V8 being GCed shortly. Hence links of the script shown in
console of DevTools become invalid after GC. This patch saved compiled
scripts from Node globally to survival from GC.

Fixed nwjs/nw.js#4269

[rogerwang]

Is this PR the only one needed to fix 4269?

[ghostoy]

@rogerwang I just updated the patch. The idea is similar as previous patch, but moved the implementation from C++ to JS. And it also fixes the broken links in app window by transforming filename into file:// protocol. Adding file:// protocol will break libraries, like bindings, which detects calling script from stack trace. So I've removed this part from patch.

And yes, it's the only patch to fix the issue. I'll submit test case to nw.js repo later.