Update kernel to builds 8747247 am: a60cfd505d am: c358c8114a

Original change: https://googleplex-android-review.googlesource.com/c/kernel/prebuilts/5.15/x86-64/+/19009986

Change-Id: Iae12784d73aeed65d8c3db275525fa8bc03c05f1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>