am e528cbdc: am 12313686: am ee3a3c1f: am c2c5e505: doc change: include SDK Tools in notice to 1.6 developers.

Merge commit 'e528cbdcb556d095b8d673c1d8933f1e5c1c6eab'

* commit 'e528cbdcb556d095b8d673c1d8933f1e5c1c6eab':
  doc change: include SDK Tools in notice to 1.6 developers.