Disable Google Translate on viewer in Chrome.

test/pdfs/yo01.pdf triggered "This page is in Japanese. Would you like to translate it?" info bar in Chrome. This commit adds an extra [meta tag](https://support.google.com/webmasters/answer/79812?hl=en) to the viewer for GENERIC and CHROME to disable this "feature"..

![pdfjs-google-translate](https://f.cloud.github.com/assets/1365071/801292/54fd194e-ed9c-11e2-8003-e7a5be51d90a.png)