upgrades: move storage migration steps to 121a2
Add dependencies of dependencies to dependences.tsv
Merge pull request #810 from bz2/dependent_dependencies

Add dependencies of dependencies to dependences.tsv

The windows-required service package depends on the guy's osext package, and several of our subprojects have switched to the new gopkg.in location of gocheck.

http://reviews.vapour.ws/r/78/
provider/ec2: set UploadArches for tests

Ensure we upload AMD64 tools in tests,
regardless of host architecture.

Fixes https://bugs.launchpad.net/juju-core/+bug/1372961
Add comment about arch coverage
Merge pull request #822 from axw/lp1372961-ec2-tests-i386

provider/ec2: set UploadArches for tests

Ensure we upload AMD64 tools in tests,
regardless of host architecture.

Fixes https://bugs.launchpad.net/juju-core/+bug/1372961
Merge pull request #814 from axw/upgrades-steps-121a2

upgrades: move storage migration steps to 121a2