Added circle.yml for CircleCI
Added circle.yml for CircleCI

Summary:In order for the build to pass on CircleCI, we need to add the Android NDK to the path - so I added a simple `circle.yml` file.
Also, CircleCI does not support v23.0.0 for the Android build tools, so I updated them to v23.0.1.
Closes https://github.com/facebook/fresco/pull/1068

Reviewed By: kirwan

Differential Revision: D3076236

Pulled By: oprisnik

fb-gh-sync-id: d972266fa4d8e8ca7239307592367e0aa1814f9f
fbshipit-source-id: d972266fa4d8e8ca7239307592367e0aa1814f9f

wstczlt/fresco,mikandi/fresco,s1rius/fresco,desmond1121/fresco,xjy2061/NovaImageLoader,xjy2061/NovaImageLoader,0mok/fresco,facebook/fresco,HKMOpen/fresco,0mok/fresco,0mok/fresco,s1rius/fresco,s1rius/fresco,HKMOpen/fresco,MaTriXy/fresco,mikandi/fresco,mikandi/fresco,facebook/fresco,desmond1121/fresco,MaTriXy/fresco,wstczlt/fresco,mikandi/fresco,xjy2061/NovaImageLoader,wstczlt/fresco,MaTriXy/fresco,0mok/fresco,facebook/fresco,pandavickey/fresco,MaTriXy/fresco,desmond1121/fresco,desmond1121/fresco,facebook/fresco,pandavickey/fresco,HKMOpen/fresco,pandavickey/fresco,mikandi/fresco,wstczlt/fresco,0mok/fresco,MaTriXy/fresco,pandavickey/fresco,desmond1121/fresco,facebook/fresco,HKMOpen/fresco,s1rius/fresco,wstczlt/fresco,xjy2061/NovaImageLoader,facebook/fresco,pandavickey/fresco,xjy2061/NovaImageLoader