Update expatpp link, and use the name in the description.
Update expatpp link, and use the name in the description.

tiran/expat,libexpat/libexpat,libexpat/libexpat,tiran/expat,libexpat/libexpat,libexpat/libexpat,libexpat/libexpat,libexpat/libexpat,tiran/expat,tiran/expat