python-efl: add git version

* the tarball is missing .pxd files and re-building with our python-cython fails with:
  | Compiling efl/elementary/scroller.pyx because it depends on /OE
  | Error compiling Cython file:
  | ------------------------------------------------------------
  | ...
  | from libc.stdint cimport uintptr_t
  | import traceback
  | from efl.eo cimport Eo, PY_REFCOUNT
  | from efl.utils.conversions cimport _ctouni
  | from cpython cimport Py_INCREF, Py_DECREF
  | cimport efl.ecore.enums as enums
  |        ^
  | ------------------------------------------------------------
  |
  | efl/ecore/__init__.pyx:221:8: 'efl.ecore.enums.pxd' not found

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>