Update kernel-build-tools to ab/6872368

https://ci.android.com/builds/branches/aosp_kernel-build-tools/grid?head=6872368&tail=6872368

Test: treehugger
Bug: 169622016
Change-Id: Ib648a0eece1fbbb257f48db97d8222973f35df79
4 files changed
tree: 5f893cc14804025271d7bdfe97bc1954132b19d0
  1. linux-x86/
  2. build-prebuilts.sh
  3. manifest.xml
  4. OWNERS
  5. update-prebuilts.sh