Merge "x86_64: mmap rnd bits: Allow min bits of less than 32" into main am: 72d88821

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2825759



Change-Id: I9672c7ca311a3af7b860b49218697e4239b2740c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>