With TARGET_NO_KERNEL set to false, sdk_phone_arm64 build depends on
$PRODUCT_OUT/kernel, which no longer exists as of aosp/2548555 ("Cleanup
in emulator_arm64/device.mk").
$ lunch sdk_phone_arm64-eng && m
[...]
FAILED: ninja: 'out/target/product/emulator_arm64/kernel', needed by
'out/target/product/emulator_arm64/boot.img', missing and no known
rule to make it
Goldfish makefiles copy prebuilt kernels to $OUT/kernel-ranchu that
the emulator then uses, so no need to generate the boot image.
Test: lunch sdk_phone_arm64-eng && m
Change-Id: I3598ac04b352fc07679315ced4f7b7a536ccb5a5
1af7e1fa7f