Mount /dev/cpuctl in ART chroot test. am: 15f888e4a5

Original change: https://android-review.googlesource.com/c/platform/art/+/2170362

Change-Id: Ib726a076e0f0d74556374e551be581039d5b6957
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>