Update build-tools to ab/3449916

Updates ninja to 1.7.2 with some extra performance patches.

Test: Local builds
Change-Id: I8828580b05155dc0309c3dbef6bdc6eb43010a64
4 files changed
tree: ead7533a1f058ea996dcc7c54c41e834468e90ff
  1. darwin-x86/
  2. linux-x86/
  3. build-prebuilts.sh
  4. manifest.xml