Devs can still locally override or add settings by adding lines after
the `import` statement in args.gn.
This will help make sure that everyone has a common set of build args,
and will allow us to update everyone's build args in git.
The default_app asar was recently changed to reference files inside
`node_modules/` in addition to files inside `default_app/`. The
`js2asar.py` script was updated to interpret what this meant, but the GN
build wasn't. This change somewhat hackily makes the GN build reuse the
`js2asar.py` script so that this and also hopefully any future changes
will work in the GN build as well as the GYP build.
We're abusing the nodejs build a little bit by building it without ICU support, but forcing the inspector to be built, which depends on ICU. This synchronizes one of the build flags that's required to get ICU to link on Windows.
This is required on Windows, because in Debug mode, C++ stdlib containers have a different size to when in Release mode, so the code in `node.dll` thought that `node::Environment` was a different size to the code in `electron.exe`, which uh, caused problems.
It should also make debugging through node a bit easier on all platforms.
For some reason the windows node build needs `.dll` on the ends of these libraries, and also needs to be linked against `dbghelp`.
Additionally, copy the `WHOLEARCHIVE` hacks from common.gypi, which was doing the same thing.
