gcc's AddressSanitizer makes system calls that our filter doesn't
allow for, resulting in a fatal error when run under a restrictive
seccomp filter.
try-syscall is a helper for the test, rather than being code under test
itself, so we don't really need this instrumentation in it: all we want
it to do is make some specific syscalls.
Signed-off-by: Simon McVittie <smcv@collabora.com>
c991f2dd9a