Update google-api-php-client to 1.1.2

Just keeping up to date with upstream. Adds an autoloader. Also adds a logging mechanism with a couple of implementations, we could perhaps see if we can take advantage of that to stream the library's logs into the OC logs, but I didn't look into that yet.

I'm getting an error from doctrine-dbal trying to run the tests ATM, but I at least did a manual test of 1.1.2 on my server and it seems to work fine. If anyone else can run the test suite on this it'd be a help, thanks.