evas textblock: adds missing legacy types

evas textblock: adds missing legacy types

Summary:
Adds missing legacy types. The following types were generated in
"*.eo.legacy.h" by Eolian.
- Evas_Textblock
  evas_textblock.eo.legacy.h:7:typedef Eo Evas_Textblock;

- Evas_Textblock_Node_Format
  evas_textblock.eo.legacy.h:14:typedef struct _Evas_Textblock_Node_Format Evas_Textblock_Node_Format;

@fix

Test Plan: N/A

Reviewers: raster, cedric, herdsman, devilhorns

Subscribers: #committers, zmike

Tags: #efl

Differential Revision: https://phab.enlightenment.org/D6529