Update gyp to latest

[implausible]

Hey, was working with pangyp and noticed that internally, gyp is 2 years old. Needed --no-duplicate-basename-check from the latest build of gyp.

Sidenote: How can I pass this flag into pangyp configure

[JCMais]

@rvagg Can you please check this?

It's also needed to compile under Visual Studio 2015.

[rvagg]

sorry about the delay, pangyp is low priority for me as it was only ever meant to be temporary, will merge and release with a minor bump now.

[am11]

👍
This is also blocking me building node-sass binaries using VS2015.

[JCMais]

AFAIK, this was already merged, but @rvagg / @implausible forgot to close this pr.

See commit 6b1641b

[am11]

@JCMais, thanks! Took a closer look, node_modules/.bin/pangyp rebuild after npm install --msvs_version=2015 indeed generates VS2015 .vcxproj, but the build script spawns the wrong msbuild version (it blindly selects the one it finds in PATH), instead of matching the version of Toolset the project file is requiring.