CRWDecoder: support reading ISO values. Refs #11143
CRWDecoder: support reading ISO values. Refs #11143

Based on exiv2 and exiftool

darktable-org/rawspeed,klauspost/rawspeed,darktable-org/rawspeed,darktable-org/rawspeed,anarsoul/rawspeed,LebedevRI/rawspeed,klauspost/rawspeed,LebedevRI/rawspeed,darktable-org/rawspeed,anarsoul/rawspeed,LebedevRI/rawspeed,LebedevRI/rawspeed,anarsoul/rawspeed,darktable-org/rawspeed,LebedevRI/rawspeed