Update build-tools to ab/4534650 am: 2212d17cf2
am: 5c59667b2e

Change-Id: Ibf4688d3fd73da07a2516266c0511327547f76ac
tree: 0b47405491526ef796153b715f2d0a054694ffa7
  1. common/
  2. darwin-x86/
  3. linux-x86/
  4. build-prebuilts.sh
  5. manifest.xml
  6. OWNERS