Add a script to update kernel prebuilts am: 17cde29063 am: dfd1ee8633 am: 1531268145

Original change: https://googleplex-android-review.googlesource.com/c/platform/prebuilts/qemu-kernel/+/10714328

Change-Id: I12681bd93c43eae9900c91a5da2fb8d1d5b842cb