tests: Work around a binutils behaviour change

See https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=964457

Signed-off-by: Simon McVittie <smcv@collabora.com>
6 jobs for master in 7 minutes and 49 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
manual #40219
allowed to fail manual
build:arch
passed #40215
build:asan

00:02:45

passed #40218
build:bionic

00:07:48

passed #40217
build:buster

00:06:57

passed #40216
build:stretch

00:07:28

passed #40214
build:ubsan

00:02:57