Don't use MREMAP_DONTUNMAP on host when kernel < 5.13 am: 605774b259 am: c5474f5195 am: dbe43f8b60

Original change: https://android-review.googlesource.com/c/platform/art/+/2182518

Change-Id: Idbc31e8e12d61d8335f770ee1caad7429e8b81ec
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>