Revert \\\\"Update build-tools to ab/3050982\\\\" am: b3824a4dac am: dea80d0bf2 am: d835115f56
am: 6bd07b8af1

Change-Id: Ia568f818f9a1de4f75a84fb9e6cd57262ae8502d
tree: 3e569a3a50211ac34c1041c7cb573fb662003fd8
  1. darwin-x86/
  2. linux-x86/
  3. build-prebuilts.sh