tools: Don't barf when p11-kit -h
tools: Don't barf when p11-kit -h

Distrotech/p11-kit,pspacek/p11-kit,lkundrak/p11-kit,lkundrak/p11-kit,pspacek/p11-kit,Distrotech/p11-kit,Distrotech/p11-kit,pspacek/p11-kit,freedesktop-unofficial-mirror/p11-glue__p11-kit,pspacek/p11-kit,freedesktop-unofficial-mirror/p11-glue__p11-kit,lkundrak/p11-kit,freedesktop-unofficial-mirror/p11-glue__p11-kit,Distrotech/p11-kit