am a7f3e75e: am 2d03b2a5: am 8ccddf4c: Merge change Id49751eb into eclair-sdk

Merge commit 'a7f3e75ebb849bff947d12b3be24145c4cb9de9a' into eclair-mr2-plus-aosp

* commit 'a7f3e75ebb849bff947d12b3be24145c4cb9de9a':
  SDK Manager: reuse complete downloads, retry Windows locks.