Update build-tools to ab/3050982
am: 5a966750a5

Change-Id: I42425485030e8d07b1f0e879b597f18102e73b1c
tree: 3c6072889457e0ff890ebd6d2dd33671cebc1cd2
  1. darwin-x86/
  2. linux-x86/
  3. build-prebuilts.sh