Remove pkg/bootstrap from our go distribution
am: 817bd2eb73

Change-Id: I3420d397a63e00494372375a4e813cc112e6f632
tree: f3fa5e992f211e481163abbf5a8a50672d61d149
  1. darwin-x86/
  2. linux-x86/
  3. build-prebuilts.sh
  4. manifest.xml