[automerger skipped] Stop using varargs in libkeyutils. am: 8f4bb45a -s ours...

[automerger skipped] Stop using varargs in libkeyutils. am: 8f4bb45a -s ours am: 5785f0b6 -s ours am: 9b9d86b3 -s ours am: d9ed02e8 -s ours

am skip reason: Change-Id I3a6b68865e6b4c37ac005f5f24c3d6e1de7c5bac with SHA-1 44a5f0ed is in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/system/core/+/11808927

Change-Id: Ibeff8bced203d4f42a8970aad78af5cebdf5ddc1