hammerhead: add keystore.msm8974 package
hammerhead: add keystore.msm8974 package

Change-Id: I7368eefc35fb7de2b2ef818298a63e6fa3a6c7bb

maruos/android_device_lge_hammerhead,maruos/android_device_lge_hammerhead,maruos/android_device_lge_hammerhead,maruos/android_device_lge_hammerhead