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

Change-Id: I5416761b0bddfceaaf157b0de2f0f3fe22a31348
tree: 3e569a3a50211ac34c1041c7cb573fb662003fd8
  1. darwin-x86/
  2. linux-x86/
  3. build-prebuilts.sh