minijail: add local definitions of MADV_FREE and __NR_membarrier am: 45b8aa4693 am: 9fd8cacad0 am: d3bce99497

Original change: https://android-review.googlesource.com/c/platform/external/minijail/+/2366449

Change-Id: Idc77d1f7683dcdeb804429a4f3e10963dcf4ebdf
Signed-off-by: Automerger Merge Worker <[email protected]>