Label: inform LineBreakMode to elm_label

Label: inform LineBreakMode to elm_label

 - When ellipsis/linewrap mode is set to elm_label
   signal is emitted to elm_label's resize_obj(edc)
   to change text attribute.
 - Sending signal logic similar to elm_label is added
   because Span directly sets text to resize_obj directly
   by style_user_push() and signal which should be
   emitted by elm_label is not sent.
 - This commit depends on
   https://review.tizen.org/gerrit/#/c/115950/

Change-Id: If40362986d8ec772ba353d2498deab89c4cbfd20
Signed-off-by: Sungtaek Hong <sth253.hong@samsung.com>