The wait4 syscall didn't match (Ubuntu 18.04, glibc 2.27)
```
25: /home/tej/code/syscall_intercept/test/libcintercept0.log.match:5   $(S) $(XX) -- wait4(-1, 0x0, 0x0, 0x0) = ?
25: .log.logging:3         /lib/x86_64-linux-gnu/libc.so.6 0xe45ef -- wait4(4294967295, 0x0, 0x0, 0x0) = ?
25: FAIL: match.pl: /home/tej/code/syscall_intercept/test/libcintercept0.log.match:5 did not match pattern
```