am f7a480d: AI 148759: Add download page for NDK 1.5 r1.

Merge commit 'f7a480de8c0402850a25db34ad25d86e6d82e699' into donut

* commit 'f7a480de8c0402850a25db34ad25d86e6d82e699':
  AI 148759: Add download page for NDK 1.5 r1.