Fix for text layout.

* If a character is shaped in more than one glyph and this character is at the end of a text,
  each glyph was rendered in a different line.
  This is because the segmentation info says the last character is a MUST_BREAK. When the glyphs
  of the last character are traversed they get a MUST_BREAK and they are laid-out in a new line.

Change-Id: Ic88a196bd0787e819dba0e7a887b4486506e7a50
Signed-off-by: Victor Cebollada <v.cebollada@samsung.com>