Android NDK r21 RC1 (build 6011959)
Update prebuilts to ab/2774618
am: 7475602

* commit '7475602d26922903d557080ad177e2cb74d3cf81':
  Update prebuilts to ab/2774618

Change-Id: I9022874802607e318b5d7dcc68cabcee92bdafc1
tree: 7eab3531d095469db2116f641dfc8f39d1d5ebbc
  1. build-common.sh
  2. build-ninja.sh
  3. LICENSE
  4. MODULE_LICENSE_APL
  5. ninja