Use efl_text_markup_set/get for elm_layout_text_set/get

Use efl_text_markup_set/get for elm_layout_text_set/get

This patch set has following upstream commit.

(1) commit 429e19563d15a02d3417ff8fffca994ce6685249

    elm: make elm_layout_text_set use efl_text_markup_set

    The elm_layout_text_get is using efl_text_markup_get by following commit.

        commit c07a40c745c5df1b1f6f0bbf666b233d8d072ca7
        elm: make elm_object_text_get return markup info as well.

        This commit solves following issue

        https://phab.enlightenment.org/T6642

        If I set object text as below
        elm_object_text_set(btn, "Some<br>text");
        then elm_object_text_get(btn) returns "Some text" not "Some<br>text".

    So using efl_text_markup_set makes sense.

(2) commit c07a40c745c5df1b1f6f0bbf666b233d8d072ca7

    elm: make elm_object_text_get return markup info as well.

    This commit solves following issue

    https://phab.enlightenment.org/T6642

    If I set object text as below
    elm_object_text_set(btn, "Some<br>text");
    then elm_object_text_get(btn) returns "Some text" not "Some<br>text".

Change-Id: I84ee20c6e30a201c0fbf22d7779ffb9187d1d07e