Fix for Shaping.

Fix for Shaping.
  - In a text with different scripts, the text is shaped in runs of
    characters with the same script. Adpator return the character
    index of each glyph starting always by 0. Toolkit was not
    updating the indices given by the adaptor for the runs after the
    first one.
  - characterIndices renamed to glyphsToCharactersMap.
  - Adaptor retrieves the glyphsToCharactersMap. Toolkit was setting
    the glyphsToCharactersMap to the charactersPerGlyph vector.

Change-Id: I9c74741fadb6d68bca29629ff79ed7bc48dd2840
Signed-off-by: Victor Cebollada <v.cebollada@samsung.com>