Bypass libc memfd_create when building with glibc am: 11ba04ed31 am: f8663e2827 am: 8fbe0a93f7 am: 2158b39bde

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/nix/+/2515636

Change-Id: Id5150487bb725d11ca478dd5b9a5343a4b4afb23
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>