allowlist new Linux close_range() system call, use it in posix_spawn() am: 436980d31c

Original change: https://googleplex-android-review.googlesource.com/c/platform/bionic/+/18092494

Change-Id: I16c8b93587667162c586de1fd56c9c6a73ae83b8
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>