Backout bug 899804 for build errors.
Bug 900594. Support Android SDK v18.0.1 r=glandium

This makes configure use build-tools instead of platform-tools

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extra : rebase_source : 7cf330f178b81dc30dc1cc15af52a03329330c3a
Bug 766359 - Background update of add-ons/addons: Make success notification/toast more informative