tests: Allow munmap() syscall in Python test #24

The python live test, 24-live-arg_allow.py, started failing on
Python version 3.9.6+ on Fedora 34 and Ubuntu 20.10.  The Python
quit() call is now invoking the munmap() syscall.  To fix this,
allow the munmap() syscall in the test's seccomp filter.

Acked-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: Tom Hromatka <tom.hromatka@oracle.com>
(cherry picked from commit 4f34c6e)

tests/24-live-arg_allow.py

@@ -41,6 +41,7 @@ def test():
     # NOTE: additional syscalls required for python
     f.add_rule(ALLOW, "write", Arg(0, EQ, fd))
     f.add_rule(ALLOW, "close")
+    f.add_rule(ALLOW, "munmap")
     f.add_rule(ALLOW, "rt_sigaction")
     f.add_rule(ALLOW, "rt_sigreturn")
     f.add_rule(ALLOW, "sigaltstack")