better constraint failure reporting

ChangeLog

libasn1compiler/asn1c_constraint.c

skeletons/BIT_STRING.c

skeletons/GeneralizedTime.c

skeletons/IA5String.c

skeletons/NumericString.c

skeletons/OBJECT_IDENTIFIER.c

skeletons/PrintableString.c

skeletons/UTCTime.c

skeletons/UTF8String.c

skeletons/VisibleString.c

skeletons/constr_CHOICE.c

skeletons/constr_SEQUENCE.c

skeletons/constr_SET.c

skeletons/constr_SET_OF.c

tests/19-param-OK.asn1.-P

tests/42-real-life-OK.asn1.-PR

tests/50-constraint-OK.asn1.-P