Merge "Move M_PURGE to M_PURGE_ALL." am: 345f54666a

Original change: https://android-review.googlesource.com/c/platform/bionic/+/2504135

Change-Id: I62115c19f3b09dc8ecec66411881384aaffc10b3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>