MOBI: When reading metadata from mobi files, put the contents of the ASIN field into an identifier named mobi-asin

src/calibre/ebooks/mobi/reader/headers.py

@@ -126,6 +126,7 @@ def process_metadata(self, idx, content, codec):
         elif idx == 113: # ASIN or other id
             try:
                 self.uuid = content.decode('ascii')
+                self.mi.set_identifier('mobi-asin', self.uuid)
             except:
                 self.uuid = None
         elif idx == 116: