Merge "Revert "Remove the return type from the syscall lists and parser."" into main am: 083194ab75 am: 09c438862e

Original change: https://android-review.googlesource.com/c/platform/bionic/+/3487202

Change-Id: If32411e22308ad23b3ce042b8e7f7acedb4c1145
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>