[Bug general/29176] run-backtrace-native-biarch.sh seems to fail on Ubuntu Jammy

[evvers at ya dot ru]

https://sourceware.org/bugzilla/show_bug.cgi?id=29176

--- Comment #3 from Evgeny Vereshchagin <evvers at ya dot ru> ---
I added printf and here's what it printed on Ubuntu Jammy:
```
FRAMENO: '0', SYMNAME: '__kernel_vsyscall'
FRAMENO: '1', SYMNAME: ''
FRAMENO: '2', SYMNAME: 'raise'
FRAMENO: '3', SYMNAME: 'main'
FRAMENO: '4', SYMNAME: ''
FRAMENO: '5', SYMNAME: '__libc_start_main'
FRAMENO: '6', SYMNAME: '_start'
FRAMENO: '0', SYMNAME: '__kernel_vsyscall'
FRAMENO: '1', SYMNAME: ''
case 0: expected symname 'raise' got '(null)'
```

On Fedora 35 (where the test passes) I got
```
FRAMENO: '0', SYMNAME: '__kernel_vsyscall'
FRAMENO: '1', SYMNAME: '__pthread_kill_implementation'
FRAMENO: '2', SYMNAME: 'raise'
FRAMENO: '3', SYMNAME: 'main'
FRAMENO: '0', SYMNAME: '__kernel_vsyscall'
FRAMENO: '1', SYMNAME: '__pthread_kill_implementation'
FRAMENO: '2', SYMNAME: 'raise'
FRAMENO: '3', SYMNAME: 'sigusr2'
FRAMENO: '4', SYMNAME: 'stdarg'
FRAMENO: '5', SYMNAME: 'backtracegen'
FRAMENO: '6', SYMNAME: 'start'
FRAMENO: '7', SYMNAME: 'start_thread'
FRAMENO: '8', SYMNAME: '__clone3'
FRAMENO: '0', SYMNAME: ''
```

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