Merge "posix_spawn_file_actions_addopen(): crash early rather than late." am: 6ef483eb87

Original change: https://android-review.googlesource.com/c/platform/bionic/+/2515747

Change-Id: If5064907ea99bce42f2e73c50c5292cb61945031
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>