Fix a typo in _cogl_matrix_init_translation
Fix a typo in _cogl_matrix_init_translation

The y translation was being initialised with the z value and the z
translation was being left as 0.0.

(cherry picked from commit b44feb617ecb9cbf7d53f0d745f686c17ef3246d)

Distrotech/cogl,Distrotech/cogl,Distrotech/cogl,Distrotech/cogl