Update kernel-build-tools to ab/6858070

https://ci.android.com/builds/branches/aosp_kernel-build-tools/grid?head=6858070&tail=6858070



New versions of elfutils and dwarves affecting pahole.

Bug: 159682555
Test: treehugger
Change-Id: I966d1627bc92f45c3a64be5c3fb0f221af25ad14
Signed-off-by: Matthias Maennich <maennich@google.com>