Revert "deps: upgrade npm to 3.3.6"

[evanlucas]

This reverts commit 41923c0.

We ran into the missing module issue again...

https://ci.nodejs.org/job/node-test-commit-osx/987/nodes=osx1010/console

/cc @Fishrock123

gyp ERR! UNCAUGHT EXCEPTION gyp ERR! stack Error: Cannot find module 'debug'
gyp ERR! stack at Function.Module._resolveFilename (module.js:337:15)
gyp ERR! stack at Function.Module._load (module.js:287:25)
gyp ERR! stack at Module.require (module.js:366:17)
gyp ERR! stack at require (module.js:385:17)
gyp ERR! stack at Object.<anonymous> (/Users/iojs/build/workspace/node-test-commit-osx/nodes/osx1010/deps/npm/node_modules/array-index/index.js:7:13)
gyp ERR! stack at Module._compile (module.js:425:26)
gyp ERR! stack at Object.Module._extensions..js (module.js:432:10)
gyp ERR! stack at Module.load (module.js:356:32)
gyp ERR! stack at Function.Module._load (module.js:311:12)
gyp ERR! stack at Module.require (module.js:366:17)
gyp ERR! stack at require (module.js:385:17)
gyp ERR! System Darwin 14.5.0

Reference to original issue is at #1899

[evanlucas]

/cc @iarna

[jasnell]

CI to see if that really does fix the problem on the CI side: https://ci.nodejs.org/job/node-test-pull-request/569/

[jbergstroem]

This issue is making all bots go red.

[silverwind]

A fix for this is scheduled in #2286: targos@59c8297.

[jasnell]

@jbergstroem ... there's hope: https://ci.nodejs.org/job/node-test-commit-linux/1000/nodes=debian8-64/console ;-) Looks like reverting this commit saves the day on at least one of the bots so far

[iarna]

Looks like the .gitignore will need a small update. I'm PRing that now.

[jasnell]

@iarna ... if we can get a quick patch in that fixes the issue, we can likely avoid the full revert. Given that this has happened before, tho, we likely need to tweak the test process a bit before npm updates land

[iarna]

I can't actually make the previous change to the .gitignore work for me– I'll have to sit down with @zkat and figure out why it's behaving differently for the two of us.

In the meantime, there's #3494 to fix the specific problem here.

[jasnell]

Ok, 68471dd landed. Closing this.