Provision additional disk storage for build master
Provision additional disk storage for build master

Over the course of seven months of continuous operation, the Buildbot
database (together with the temporary test result files) has exceeded
the 100 gigabytes of disk space initially provisioned to store it.
Double the size of the Amazon Elastic Block Storage instance in order to
accommodate continued operation.

GoogleChrome/wptdashboard,GoogleChrome/wptdashboard,GoogleChrome/wptdashboard