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

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

Change-Id: I1fd01f92efd2fcad5954387019643eb756bfbda2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>