[kde-frameworks/kapidox] add jinja dep

I get this error with only jinja[python_targets_python2_7]:

Traceback (most recent call last):
  File /usr/lib/python-exec/python3.4/kgenapidox, line 40, in <module>
    from kapidox.generator import *
  File /usr/lib64/python3.4/site-packages/kapidox/generator.py, line 52, in <module>
    import jinja2
ImportError: No module named 'jinja2'