Not support install form a mirror host that use 3xx http status code

[gucong3000]

Steps to reproduce

Tell us about your environment:

$ npm config get puppeteer_download_host
https://npm.taobao.org/mirrors

• Puppeteer version: HEAD
• Platform / OS version: Windows 10 64
• Node.js version: v9.2.0

What steps will reproduce the problem?

Please include code that reproduces the issue.

1. run npm i GoogleChrome/puppeteer --save

What is the expected result?

Successfully installed.

What happens instead?

$ npm i puppeteer --save

> puppeteer@0.13.0 install E:\work\sms-bomber\node_modules\puppeteer
> node install.js

ERROR: Failed to download Chromium r515411! Set "PUPPETEER_SKIP_CHROMIUM_DOWNLOAD" env variable to skip download.
Error: Download failed: server returned code 302. URL: https://npm.taobao.org/mirrors/chromium-browser-snapshots/Win_x64/515411/chrome-win32.zip
    at ClientRequest.https.get.response (E:\work\sms-bomber\node_modules\puppeteer\utils\ChromiumDownloader.js:198:21)
    at Object.onceWrapper (events.js:254:19)
    at ClientRequest.emit (events.js:159:13)
    at HTTPParser.parserOnIncomingClient (_http_client.js:550:21)
    at HTTPParser.parserOnHeadersComplete (_http_common.js:117:23)
    at TLSSocket.socketOnData (_http_client.js:439:20)
    at TLSSocket.emit (events.js:159:13)
    at addChunk (_stream_readable.js:265:12)
    at readableAddChunk (_stream_readable.js:252:11)
    at TLSSocket.Readable.push (_stream_readable.js:209:10)