Evas textblock: Don't keep a copy of the string per text item.
Evas textblock: Don't keep a copy of the string per text item.

We don't need to copy it around because we have string objects now. This
lets us remove a lot of unneeded allocations and unwanted strcpys.

git-svn-id: 6d771e449150288cc513807b7f4d2af31e9482bd@58619 7cbeb6ba-43b4-40fd-8cce-4c39aea84d33

TizenChameleon/uifw-evas,TizenChameleon/uifw-evas,TizenChameleon/uifw-evas,TizenChameleon/evas,TizenChameleon/evas,TizenChameleon/evas,TizenChameleon/uifw-evas,TizenChameleon/evas