Update prebuilts for 4.9 goldfish kernels

Has cherry picks 'O-kernel-4,9-bringup' topic as in the last commit of
them, but x86 only and is off ToT android-4.9 branch:

9154940 Merge 4.9.76 into android-4.9

incl. KAISER patches.

Change-Id: I39ec38d8c8335518a65afc2972ba2a83666f3b2b
2 files changed