Fixed cloneArtifacts task

All subprojects will be configured with an external repository.
Enforce USE_EXTERNAL_REPO setting before task execution

Change-Id: I606bbe7a8e3f15a433f2adb2e49097621520672d
Fixed cloneArtifacts task
automerge: f63de19

* commit 'f63de19428e840898a1e3acbefc0186e4eb04ed0':
  Fixed cloneArtifacts task
Added tasks to create a maven style repo directory and zip file.

This will be delivered as part of the Android Studio installation
so users can use it without having to download additional bits.

Change-Id: I4c4afa07c669a0cdc46562b7bfa7e519d4d96968
Added tasks to create a maven style repo directory and zip file.
automerge: eb1014d

* commit 'eb1014d227f4635bb0598cea2a023e58d0b539a0':
  Added tasks to create a maven style repo directory and zip file.
Update version for base and gradle.

Change-Id: Ic4a966a264dc07b7f6d9571467c1a1180190e161
Update version for base and gradle.
automerge: fcab4ee

* commit 'fcab4eeb5b890f8234d662f76c3e8bcd2c95f635':
  Update version for base and gradle.