Generated metadata is not updated after initial build until after 'gradle clean' is called

[atanasovg]

From @ginev on September 17, 2015 9:2

Generated metadata is not updated during subsequent builds which makes newly added '.aar' dependencies unreachable through the JS layer.

Copied from original issue: NativeScript/NativeScript#757

[atanasovg]

Issue is better described here #230