API: heif_item_add_property_uuid()

[dukesook]

Boxes of type 'uuid' can be used to store user-define data. The GIMI profile uses uuid boxes as properties to store KLV metadata.

The extended_type (also known as the uuid_type) is used to identify the uuid data itself.

See ISO 14496-12 secions 4.2.2 & 11.1/