test: wrap `ls` and `stat` to make it work w/ sanitizers in specific cases

When `/etc/nsswitch.conf` uses `systemd` together with `[SUCCESS=merge]`,
`ls -l` will pull in `libnss_systemd` causing `SIGABRT`, as `ls` is not
instrumented (by default):

```
-bash-5.1# strace -f -e %file ls -l /dev
execve("/usr/bin/ls", ["ls", "-l", "/dev"], 0x7ffc3bb211c8 /* 24 vars*/) = 0
...
openat(AT_FDCWD, "/etc/passwd", O_RDONLY|O_CLOEXEC) = 3
newfstatat(3, "", {st_mode=S_IFREG|0644, st_size=1896, ...}, AT_EMPTY_PATH) = 0
newfstatat(AT_FDCWD, "/etc/nsswitch.conf", {st_mode=S_IFREG|0644, st_size=359, ...}, 0) = 0
openat(AT_FDCWD, "/etc/group", O_RDONLY|O_CLOEXEC) = 3
newfstatat(3, "", {st_mode=S_IFREG|0644, st_size=965, ...}, AT_EMPTY_PATH) = 0
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
newfstatat(3, "", {st_mode=S_IFREG|0644, st_size=10779, ...}, AT_EMPTY_PATH) = 0
openat(AT_FDCWD, "/usr/lib/libnss_systemd.so.2", O_RDONLY|O_CLOEXEC) = 3
newfstatat(3, "", {st_mode=S_IFREG|0755, st_size=16195176, ...}, AT_EMPTY_PATH) = 0
openat(AT_FDCWD, "/usr/lib/libasan.so.8", O_RDONLY|O_CLOEXEC) = 3
...
readlink("/proc/self/exe", "/usr/bin/ls", 4096) = 11
open("/proc/self/cmdline", O_RDONLY)    = 3
open("/proc/self/environ", O_RDONLY)    = 3
==620==ASan runtime does not come first in initial library list; you should either link runtime to your application or manually preload it with LD_PRELOAD.
--- SIGABRT {si_signo=SIGABRT, si_code=SI_TKILL, si_pid=620, si_uid=0} ---
+++ killed by SIGABRT (core dumped) +++
Aborted (core dumped)
```

This also happens with `stat`. Let's add both `ls` and `stat` to the "wrap list"
to work around this.

Spotted on Arch Linux.

1 files changed, 3 insertions, 1 deletions

diff --git a/test/test-functions b/test/test-functions
index 3dfbf94cad..331e98c04e 100644
--- a/test/test-functions
+++ b/test/test-functions
@@ -2569,8 +2569,10 @@ inst_binary() {
     # Same as above, but we need to wrap certain libraries unconditionally
     #
     # getent, login, su, useradd, userdel - dlopen()s (not only) systemd's PAM modules
+    # ls, stat - pulls in nss_systemd with certain options (like ls -l) when
+    #            nsswitch.conf uses [SUCCESS=merge] (like on Arch Linux)
     # tar - called by machinectl in TEST-25
-    if get_bool "$IS_BUILT_WITH_ASAN" && [[ "$bin" =~ /(getent|login|su|tar|useradd|userdel)$ ]]; then
+    if get_bool "$IS_BUILT_WITH_ASAN" && [[ "$bin" =~ /(getent|login|ls|stat|su|tar|useradd|userdel)$ ]]; then
         wrap_binary=1
     fi