trust: Print label of certificate when complaining about basic constraints
trust: Print label of certificate when complaining about basic constraints

https://bugs.freedesktop.org/show_bug.cgi?id=82328

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