[strace/strace] Sudo effective user don't work with --seccomp-bpf (#126)

[Dmytro Kolomoiets]

Literally. This works:
```bash
$ sudo strace -qqu $USER -e trace=execve -e signal=none -- sudo true

execve("/usr/bin/sudo", ["sudo", "true"], 0x7ffe1fc6b730 /* 13 vars */) = 0
```
And this not:
```bash
$ sudo strace --seccomp-bpf -fqqu $USER -e trace=execve -e signal=none -- sudo true

execve("/usr/bin/sudo", ["sudo", "true"], 0x7ffc693481d8 /* 13 vars */) = 0
sudo: effective uid is not 0, is /usr/bin/sudo on a file system with the 'nosuid' option set or an NFS file system without root privileges?

```
Is it temporary regression or `--seccomp-bpf` is fundamentally impossible for this usecase?

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