Update prebuilt build tools to ab/2924154 am: 197b0fc726
am: 2e7a257ade

* commit '2e7a257adee24075c893afee3cfd38bfff272fd0':
  Update prebuilt build tools to ab/2924154

Change-Id: Ia0b9c30402c8e45850d9b54b7c1203e096a0c02b
tree: 6dd218b2bf5c47ce8f868d72304f5e99c7b770cf
  1. darwin-x86/
  2. linux-x86/
  3. build-prebuilts.sh