Release annnouncement as per https://github.com/seccomp/libseccomp/releases/tag/v2.5.3:
Version 2.5.3 - November 5, 2021
Update the syscall table for Linux v5.15
Fix issues with multiplexed syscalls on mipsel introduced in v2.5.2
Document that seccomp_rule_add() may return -EACCES
Fix issues with test 11-basic-basic_errors on old kernels (API level < 5)
Signed-off-by: Peter Müller <peter.mueller@ipfire.org>