trust: Print out usage when extract-trust run incorrectly
trust: Print out usage when extract-trust run incorrectly

Also sorta covers --help and -h usage

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