vndk-def: Mark libselinux as VNDK in eligible list

This commit marks libselinux as VNDK in eligible-list-master.csv and
add a comment to eligible-list-o-mr1-release.csv.

Bug: 69587962
Test: libselinux related warnings disappear
Change-Id: I6502a5efdc8c0503c13bd2006d9dc160ab008168
2 files changed