[scudo] Add errno description to mmap failure. (#87713) am: 4de720a30d

Original change: https://android-review.googlesource.com/c/platform/external/scudo/+/3029925

Change-Id: I38d6442c57c69298b520e4df8b248f192499e546
Signed-off-by: Automerger Merge Worker <[email protected]>