Surpress setns exception throw when running in valgrind
Valgrind does not support setns syscall.  So we ignore the error
when running in valgrind so that we check for memory issues.


git-svn-id: https://svn.resiprocate.org/rep/resiprocate/main@11178 ddefafc4-47db-0310-ae44-fa13212b10f2